Question 1

A scatter plot _________.

Accepted Answer

A)  has to do with electron scatter 
B)  is a graph of paired X and Y values 
C)  must be linear 
D)  is a frequency graph of X values 
A)  has to do with electron scatter 
B)  is a graph of paired X and Y values 
C)  must be linear 
D)  is a frequency graph of X values

Question 2

After several studies, Professor Smith concludes that there is a zero correlation between body weight and bad tempers. This means that _________.

Accepted Answer

A)  heavy people tend to have bad tempers 
B)  skinny people tend to have bad tempers 
C)  no one has a bad temper 
D)  everyone has a bad temper 
E)  a person with a bad temper may be heavy or skinny 
A)  heavy people tend to have bad tempers 
B)  skinny people tend to have bad tempers 
C)  no one has a bad temper 
D)  everyone has a bad temper 
E)  a person with a bad temper may be heavy or skinny

Question 3

Why are z scores used, instead of raw scores, as the basis for determining Pearson r ? Explain.

Accepted Answer

Z scores are used instead of raw scores

Question 4

The slope of a line is a measure of its rate of change.

Accepted Answer

A) True 
 B)False

Question 5

Define coefficient of determination.

Accepted Answer

The coefficient of determination, often

Question 6

Correlation implies causation.

Accepted Answer

A) True 
 B)False

Question 7

Pearson r requires that the data be of interval or ratio scaling.

Accepted Answer

A) True 
 B)False

Question 8

If the N is small, can an extreme score cause problems in interpreting the size of the relationship? Explain

Accepted Answer

Yes, if the sample size (N) is small, an

Question 9

If N is small, an extreme score _________.

Accepted Answer

A)  won't affect r obt unduly 
B)  should be thrown out 
C)  might have a large effect on r obt 
D)  has no effect on the value of r obt 
A)  won't affect r obt unduly 
B)  should be thrown out 
C)  might have a large effect on r obt 
D)  has no effect on the value of r obt

Question 10

Define correlation.

Accepted Answer

Correlation is a statistical measure tha

Question 11

The formula for rho is actually just the formula for Pearson's r simplified to apply to lower order scaling.

Accepted Answer

A) True 
 B)False

Question 12

A study is conducted to determine the reliability of two judges in assessing musical performance. The judges are asked to rate 8 musical contestants on a twenty point scale. The higher the rating, the greater is the assessed musical talent. The following data 
   Assuming the data are only of ordinal scaling, use the appropriate correlation coefficient to assess how alike the judges are in their ratings.

Accepted Answer

The answer of A study is conducted to determine the...

Question 13

In the equation Y = bX + a , X and Y , b is _________.

Accepted Answer

A)  a constant 
B)  the slope of the line 
C)  the Y axis intercept 
D)  a constant and slope of the line 
E)  a variable 
A)  a constant 
B)  the slope of the line 
C)  the Y axis intercept 
D)  a constant and slope of the line 
E)  a variable

Question 14

An ornithologist wants to know how much of a relationship there is between the weight gain of the female flicker during the spring and the number of eggs laid. What is the Pearson r for the data the ornithologist gathered? 
   How much of the variability in the number of eggs is accounted for by the amount of weight gained?

Accepted Answer

The answer of An ornithologist wants to know how much...

Question 15

If zX equals zY for each pair of points, r will equal _______.

Accepted Answer

A)  0.00 
B)  - 1.00 
C)  1.00 
D)  0.50 
A)  0.00 
B)  - 1.00 
C)  1.00 
D)  0.50

Question 16

The closer the points on a scatter diagram fall to the regression line, the _________ between the scores.

Accepted Answer

A)  higher the correlation 
B)  lower the correlation 
C)  correlation doesn't change 
D)  need more information 
A)  higher the correlation 
B)  lower the correlation 
C)  correlation doesn't change 
D)  need more information

Question 17

Give two definitions of Pearson r .

Accepted Answer

Pearson's r, also known as the Pearson p

Question 18

A correlation of r = 0.60 exists between a set of X and Y scores. If a constant of 10 is added to each score of both distributions, the value of r will _______.

Accepted Answer

A)  remain the same 
B)  will increase 
C)  decrease 
D)  be less meaningful 
E)  will increase and be less meaningful 
A)  remain the same 
B)  will increase 
C)  decrease 
D)  be less meaningful 
E)  will increase and be less meaningful

Question 19

If the value of r on ratio scaled raw data were 0.87 and the pairs of numbers were converted to ordinal data, and r calculated for the ordinal data, r would equal 0.87.

Accepted Answer

A) True 
 B)False

Question 20

Using the following table, construct a scatter plot of the pairs of values for height and weight. Calculate the correlation between height and weight.

Accepted Answer

The answer of Using the following table, construct a scatter...

A scatter plot _________.

After several studies, Professor Smith concludes that there is a zero correlation between body weight and bad tempers. This means that _________.

Why are z scores used, instead of raw scores, as the basis for determining Pearson r ? Explain.

The slope of a line is a measure of its rate of change.

Define coefficient of determination.

Correlation implies causation.

Pearson r requires that the data be of interval or ratio scaling.

If the N is small, can an extreme score cause problems in interpreting the size of the relationship? Explain

If N is small, an extreme score _________.

Define correlation.

The formula for rho is actually just the formula for Pearson's r simplified to apply to lower order scaling.

In the equation Y = bX + a , X and Y , b is _________.

If zX equals zY for each pair of points, r will equal _______.

The closer the points on a scatter diagram fall to the regression line, the _________ between the scores.

Give two definitions of Pearson r .

A correlation of r = 0.60 exists between a set of X and Y scores. If a constant of 10 is added to each score of both distributions, the value of r will _______.

If the value of r on ratio scaled raw data were 0.87 and the pairs of numbers were converted to ordinal data, and r calculated for the ordinal data, r would equal 0.87.

Using the following table, construct a scatter plot of the pairs of values for height and weight. Calculate the correlation between height and weight.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 6: Correlation

A scatter plot _________.

After several studies, Professor Smith concludes that there is a zero correlation between body weight and bad tempers. This means that _________.

Why are z scores used, instead of raw scores, as the basis for determining Pearson r ? Explain.

The slope of a line is a measure of its rate of change.

Define coefficient of determination.

Correlation implies causation.

Pearson r requires that the data be of interval or ratio scaling.

If the N is small, can an extreme score cause problems in interpreting the size of the relationship? Explain

If N is small, an extreme score _________.

Define correlation.

The formula for rho is actually just the formula for Pearson's r simplified to apply to lower order scaling.

In the equation Y = bX + a , X and Y , b is _________.

If zX equals zY for each pair of points, r will equal _______.

The closer the points on a scatter diagram fall to the regression line, the _________ between the scores.

Give two definitions of Pearson r .

A correlation of r = 0.60 exists between a set of X and Y scores. If a constant of 10 is added to each score of both distributions, the value of r will _______.

If the value of r on ratio scaled raw data were 0.87 and the pairs of numbers were converted to ordinal data, and r calculated for the ordinal data, r would equal 0.87.

Using the following table, construct a scatter plot of the pairs of values for height and weight. Calculate the correlation between height and weight.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters