What does 1 - r^2 measure?

What does 1 - r^2 measure? a. The relative importance of all other possible predictor variables on y. b. The percentage of points that are on the...

Which of the following statements is not correct regarding the correlation.

Which of the following statements is not correct regarding the correlation. a. It can range from -1 to 1. b. Its square is the percentage of variance...

The primary purpose of a regression equation is to

The primary purpose of a regression equation is to a. measure the association between two variables. b. estimate the value of the dependent variable...

The ratio of SS(Regression) divided by the SS(Total) is also called the

The ratio of SS(Regression) divided by the SS(Total) is also called the a. sum of squares due to regression b. percentage of variance accounted for c....

Which of the following is not based on a correlation or a regression line relating y to x?

Which of the following is not based on a correlation or a regression line relating y to x? a. The standard error b. The percentage of variance accounted...

The percentage of variance accounted for

The percentage of variance accounted for a. is the square of the coefficient of correlation. b. cannot be negative. c. gives the percent of the variation...

The standard error is

The standard error is a. computed from squared deviations from the regression line. b. may be negative c. is given in squared units of the independent...

A regression equation is used to predict women's Weight (in pounds) from their Height (in inches). The correlation between Weight (W) and Height (H) turned out to be 0.70 . The average H was 64 inches and the average W was 119.6 pounds.

A regression equation is used to predict women's Weight (in pounds) from their Height (in inches). The correlation between Weight (W) and Height (H)...

In a regression problem, n=207 and SS(Residual)=0. Find the correlation coefficient.

In a regression problem, n=207 and SS(Residual)=0. Find the correlation coefficient. a. 0.207 b. 0.00 c. 1.00 d. -1.00 e. either +/- 1.00 Answer: e....

What is the formula for the correlation coefficient in terms of the cov?

The covariance, denoted cov, is computed from: cov = 1/(n-1) * [E](X - X(bar))(Y - Y(bar)) What is the formula for the correlation coefficient in...

The coefficient of correlation was computed to be -0.60. This means

The coefficient of correlation was computed to be -0.60. This means a. the slope and intercept of the regression line are both negative b. as x increases,...

We obtained the following regression equation: y(hat) = 3.5 + 2.1x.. Which of the following statements are correct?

We obtained the following regression equation: y(hat) = 3.5 + 2.1x.. Which of the following statements are correct? a. The dependent variable is...

The coefficient of correlation.

The coefficient of correlation. a. Has the same sign as the slope b. Can range from -1.00 to 1.00 c. Is also called the percentage of variance accounted...

In a regression problem, n=52, SS(Total)=400, and r = -0.8367 Find the Standard Error.

In a regression problem, n=52, SS(Total)=400, and r = -0.8367 Find the Standard Error. a. 2.40 b. 0.30 c. 1.55 d. -1.55 e. -2.40 Answer: c....

Find the intercept and slope of the regression line to predict Y from X.

Given the following information: r = 0.60 Mean Standard Deviation X 40 4 Y 45 6Find the intercept and slope of the regression line to predict Y from...

The correlation between X=person's weight and Y=person's height is 0.70 . What is the correlation for the same data set if we had used X=person's height and Y=person's weight?

The correlation between X=person's weight and Y=person's height is 0.70 . What is the correlation for the same data set if we had used X=person's height...

Compute the correlation r: Given: (E)X=40, (E)Y=20, (E)XY=300, (E)X2=580, (E)Y2=400, n=10.

Compute the correlation r:Given: (E)X=40, (E)Y=20, (E)XY=300, (E)X2=580, (E)Y2=400, n=10.  a. 0.0000 b. 0.2540 c. -0.5658 d. -0.2540 e. 0.5658 Answer: e....

An Inverse Relationship means the trendline will have a _______ slope.

An Inverse Relationship means the trendline will have a _______ slope. a. positive b. negative c. zero Answer: b. negati...

If all the points are on the regression line, then

If all the points are on the regression line, then a. the value of the slope is 0. b. the value of the intercept is 0. c. the correlation coefficient...

A correlation of 0.02 would indicate:

A correlation of 0.02 would indicate: a. a very strong direct relationship b. a very weak direct relationship c. a very strong inverse relationship d....

In a regression problem, the slope = 0.40 The mean and standard deviation of the X variable are both 100. The mean and standard deviation of the Y variable are both 200. Find the correlation r.

In a regression problem, the slope = 0.40The mean and standard deviation of the X variable are both 100.The mean and standard deviation of the Y variable...

Here is an Excel printout of a regression problem. Use this for the following 4 questions.

Here is an Excel printout of a regression problem. Use this for the following 4 questions. Regression Statistics Multiple R 0.2288 R Square 0.0524 Adjusted...

What is the difference between (beta)1 and b1 ?

What is the difference between (beta)1 and b1 ? a. none; exactly the same; slope of regression line. b. (beta)1 is the unknown population value,...

R-Square values can range from _____ to ______.

R-Square values can range from _____ to ______. a. 0 1 b. -1 1 c. -1 0 d. -100 100 Answer: a. 0...

If the p-value (for the slope) on a regression printout = 0.00001 then

If the p-value (for the slope) on a regression printout = 0.00001 then a. p<0 .05="" a="" and="" at="" being="" can="" conclude="" correlation=""...

If X= the month you were born in (1,...,12) and Y=your height (inches), what r would I get if I collected data and computed the correlation?

If X= the month you were born in (1,...,12) and Y=your height (inches), what r would I get if I collected data and computed the correlation? a. -1 b....

In this regression equation: y(hat) = 10 + 4x suppose X increases from 25 to 28. How much will the predicted Y change?

In this regression equation: y(hat) = 10 + 4x suppose X increases from 25 to 28. How much will the predicted Y change? a. 3 b. 1/3 c. 10 d. 12 e....

I want to predict the sales on Saturday August 16 and I want a CLI interval prediction. What formula?

I want to use a regression line to predict the Sales (Y) of ice cream cones at the Baskin-Robbins in Galveston on Saturdays in summer. The X variable...

If the __________ of the computed regression line is 0 then we can conclude that r = 0.

If the __________ of the computed regression line is 0 then we can conclude that r = 0. a. intercept b. slope c. p-value Answer: b. slo...

The simple linear regression (least squares method) minimizes:

The simple linear regression (least squares method) minimizes: A. SS(x) B. SSE C. The explained variation D. SS(y) E. Total variation Answer: B....

If the manager decides to spend $3000 on advertising, based on the simple linear regression results given above, the estimated sales are:

Regression analysis r 0.873 r squared 0.762 Standard error 11.547 n 7 ANOVA SS Regression 2.133.3333 Residual 666.6667 Total 2,800,000 Regression output...

The strength of the relationship between two quantitative variables can be measured by:

The strength of the relationship between two quantitative variables can be measured by: A. The Y intercept of the simple linear regression equatio B....

The following results were obtained from a simple regression analysis:

The following results were obtained from a simple regression analysis: y-hat = 37.2895 - (1.2024)X r2 = .6744 What is the y-intercept of the linear...

The following results were obtained as a part of simple regression analysis:

The following results were obtained as a part of simple regression analysis: r2 = .9162 p-value = .000 The null hypothesis of no linear relationship...

A simple regression analysis with 20 observations would yield ________ degrees of freedom.

A simple regression analysis with 20 observations would yield ________ degrees of freedom. A. 18 B. 20 C. 19 D. 1 Answer: A. ...

In simple regression analysis the quantity that gives the amount by which Y (dependent variable) changes for a unit change in X (independent variable) is called the __________

In simple regression analysis the quantity that gives the amount by which Y (dependent variable) changes for a unit change in X (independent variable)...

The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line.

The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line. A. Never B. Sometimes C....

The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line.

The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line. Answer: Fa...

The slope of the simple linear regression equation represents the average change in the value of the dependent variable per unit change in the independent variable (X).

The slope of the simple linear regression equation represents the average change in the value of the dependent variable per unit change in the independent...

If r = -1, then we can conclude that there is a perfect relationship between X and Y.

If r = -1, then we can conclude that there is a perfect relationship between X and Y. Answer: Tr...

When using simple regression analysis, if there is a strong correlation between the independent and dependent variable, then we can conclude that an increase in the value of the independent variable causes an increase in the value of the dependent variable.

When using simple regression analysis, if there is a strong correlation between the independent and dependent variable, then we can conclude that an...

The dependent variable is the variable that is being described, predicted, or controlled.

The dependent variable is the variable that is being described, predicted, or controlled. Answer: Tr...

A ____ table shows a logical structure, with all possible combinations of conditions and resulting actions.

A ____ table shows a logical structure, with all possible combinations of conditions and resulting actions. a. pseudo b. logic c. decision d. va...

A ____ description documents the details of a functional primitive, which represents a specific set of processing steps and business logic.

A ____ description documents the details of a functional primitive, which represents a specific set of processing steps and business logic. a. logic b....

In the accompanying figure, the sequence structure is the completion of ____.

In the accompanying figure, the sequence structure is the completion of ____. a. one or more process steps based on the results of a test or condition b....

___ is based on combinations of the three logical structures, or control structures (one of which is shown in the accompanying figure), which serve as building blocks for the process.

___ is based on combinations of the three logical structures, or control structures (one of which is shown in the accompanying figure), which serve...

In a data dictionary, some data elements have ____ rules, such as an employee's salary must be within the range defined for the employee's job classification.

In a data dictionary, some data elements have ____ rules, such as an employee's salary must be within the range defined for the employee's job classification. a....

A data dictionary specifies a data element's ____, which is the set of values permitted for the data element.

A data dictionary specifies a data element's ____, which is the set of values permitted for the data element. a. range b. domain c. array d. any of...

In a data dictionary, ____ is the maximum number of characters for an alphabetic or character data element or the maximum number of digits and number of decimal positions for a numeric data element.

In a data dictionary, ____ is the maximum number of characters for an alphabetic or character data element or the maximum number of digits and number...

In a data dictionary, ____ refers to whether the data element contains numeric, alphabetic, or character values.

In a data dictionary, ____ refers to whether the data element contains numeric, alphabetic, or character values. a. value b. type c. valence d. d...

In a data dictionary, any name other than the standard data element name is called a(n) ____.

In a data dictionary, any name other than the standard data element name is called a(n) ____. a. clone b. cipher c. alias d. index Answer:&nb...

The data dictionary usually records and describes a default value, which is the ____.

The data dictionary usually records and describes a default value, which is the ____. a. specification of the set of values permitted for the data...

In a data dictionary, data elements are combined into ____, which are meaningful combinations of data elements that are included in data flows or retained in data stores.

In a data dictionary, data elements are combined into ____, which are meaningful combinations of data elements that are included in data flows or retained...

In a data dictionary, a(n) ____ is the smallest piece of data that has meaning within an information system.

In a data dictionary, a(n) ____ is the smallest piece of data that has meaning within an information system. a. field b. index c. record d. pixe...

A data ____ is a central storehouse of information about a system's data.

A data ____ is a central storehouse of information about a system's data. a. glossary b. knowledgebase c. content bank d. repository Answer:&...

Balancing ____.

Balancing ____. a. uses a series of increasingly detailed DFDs to describe an information system b. ensures that the input and output data flows...

Using ____, an analyst starts with an overall view, which is a context diagram with a single process symbol, and then the analyst creates diagram 0, which shows more detail.

Using ____, an analyst starts with an overall view, which is a context diagram with a single process symbol, and then the analyst creates diagram 0,...

____ maintains consistency among DFDs by ensuring that input and output data flows align properly.

____ maintains consistency among DFDs by ensuring that input and output data flows align properly. a. Balancing b. Indexing c. Leveling d. Explo...

____ is the process of drawing a series of increasingly detailed DFDs, until all functional primitives are identified.

____ is the process of drawing a series of increasingly detailed DFDs, until all functional primitives are identified. a. Leveling b. Balancing c....

Leveling ____.

Leveling ____. a. uses a series of increasingly detailed DFDs to describe an information system b. ensures that the input and output data flows of...

Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram.

Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram. a. contracted b. exploded c. condensed d....

If processes must be performed in a specific sequence, you document the information in the ____.

If processes must be performed in a specific sequence, you document the information in the ____. a. leveling guide b. process descriptions c. data...

____ is/are logically impossible in a DFD because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow.

____ is/are logically impossible in a DFD because a process must act on input, shown by an incoming data flow, and produce output, represented by an...

A gray hole is a process that has ____.

A gray hole is a process that has ____. a. no input b. at least one output and one input, but the output obviously is insufficient to generate the...

A black hole is a process that has ____.

A black hole is a process that has ____. a. no input b. at least one output and one input, but the output obviously is insufficient to generate the...

A spontaneous generation process is a process that has ____.

A spontaneous generation process is a process that has ____. a. no input b. at least one output and one input, but the output obviously is insufficient...

A DFD shows ____.

A DFD shows ____. a. how data are related b. what key fields are stored in the system c. how a system transforms input data into useful information d....

DFD symbols are referenced by using all ____ letters for the symbol name.

DFD symbols are referenced by using all ____ letters for the symbol name. a. capital b. lowercase c. italicized d. boldfaced Answer: ...

In data and process modeling, a(n) ____ model shows what the system must do, regardless of how it will be implemented physically.

In data and process modeling, a(n) ____ model shows what the system must do, regardless of how it will be implemented physically. a. operational b....