Question 1

What happens to the absolute value of   as df increases? It

Accepted Answer

A) decreases. 
B) increases. 
C) remains the same. 
D) increases or decreases depending on whether   is positive or negative. 
A) decreases. 
B) increases. 
C) remains the same. 
D) increases or decreases depending on whether   is positive or negative.

Question 2

The process of specifying a range of values within which the population parameter is estimated to fall is known as

Accepted Answer

A) interval estimation. 
B) mean estimation. 
C) point estimation. 
D) population estimation. 
A) interval estimation. 
B) mean estimation. 
C) point estimation. 
D) population estimation.

Question 3

When we construct a 95% confidence interval,we are 95% sure that the

Accepted Answer

A) sample mean falls within the interval. 
B) population mean falls within the interval. 
C) sample mean is at the center of the interval. 
D) population mean is at the center of the interval. 
A) sample mean falls within the interval. 
B) population mean falls within the interval. 
C) sample mean is at the center of the interval. 
D) population mean is at the center of the interval.

Question 4

What happens to the power of a t-test when the variability of the raw scores is increased? The power will

Accepted Answer

A) increase. 
B) decrease. 
C) remain the same. 
D) increase or decrease,depending on whether   is positive or negative. 
A) increase. 
B) decrease. 
C) remain the same. 
D) increase or decrease,depending on whether   is positive or negative.

Question 5

Suppose you conduct an experiment with 20 subjects and the   turns out to be 0.69,which is not statistically significant.Which of the following is the correct way to report your results?

Accepted Answer

A)    = 0.69,p > 0.05 
B) t(20)= 0.69,p  0.05 
A)    = 0.69,p > 0.05 
B) t(20)= 0.69,p  0.05

Question 6

Suppose you perform a two-tailed significance test on a correlation using 29 participants.Your   is 0.56,which is a significant correlation coefficient.Which of the following is the correct way to report this finding?

Accepted Answer

A) r(29)= 0.56,p  0.05 
D) r(27)= 0.56,p < 0.05 
A) r(29)= 0.56,p  0.05 
D) r(27)= 0.56,p < 0.05

Question 7

If r = 0.72,what proportion of the variance in Y is accounted for by its relationship with X?

Accepted Answer

A) 0.85 
B) 0.72 
C) 0.52 
D) Cannot be determined from the information given 
A) 0.85 
B) 0.72 
C) 0.52 
D) Cannot be determined from the information given

Question 8

When establishing the proper confidence interval for interval estimation,which of the following should be employed?

Accepted Answer

A) A two-tailed value of   
B) A one-tailed value of   
C) A one-tailed value of   
D) A two-tailed value of   
A) A two-tailed value of   
B) A one-tailed value of   
C) A one-tailed value of   
D) A two-tailed value of

Question 9

How is the t-distribution defined?

Accepted Answer

A) The distribution of all possible values of t 
B) How far the sample mean is from the µ of the sampling distribution in estimated standard error units 
C) The distribution of all possible values of t for random sample means selected from the raw score population described by   
D) The distribution of all possible values of t for random sample means selected from the raw score population described by   
A) The distribution of all possible values of t 
B) How far the sample mean is from the µ of the sampling distribution in estimated standard error units 
C) The distribution of all possible values of t for random sample means selected from the raw score population described by   
D) The distribution of all possible values of t for random sample means selected from the raw score population described by

Question 10

The confidence interval for a single F1F1F1S1F1F1F10 is

Accepted Answer

A) a point interval estimation of the population mean. 
B) a range of values of F1F1F1S1F1F1F10 that our sample mean is not likely to represent. 
C) a range of values of F1F1F1S1F1F1F10 that our sample mean is likely to represent. 
D) a point on the variable at which the population F1F1F1S1F1F1F10 is expected to fall. 
A) a point interval estimation of the population mean. 
B) a range of values of F1F1F1S1F1F1F10 that our sample mean is not likely to represent. 
C) a range of values of F1F1F1S1F1F1F10 that our sample mean is likely to represent. 
D) a point on the variable at which the population F1F1F1S1F1F1F10 is expected to fall.

Question 11

Degrees of freedom (df)for the one-sample t-test is equal to

Accepted Answer

A)    . 
B) N. 
C) N - 1. 
D)    . 
A)    . 
B) N. 
C) N - 1. 
D)    .

Question 12

The null hypothesis in a two-tailed significance test of correlation states that

Accepted Answer

A) a correlation exists in the population. 
B) no correlation exists in the population. 
C) a positive correlation exists in the population. 
D) a negative correlation exists in the population. 
A) a correlation exists in the population. 
B) no correlation exists in the population. 
C) a positive correlation exists in the population. 
D) a negative correlation exists in the population.

Question 13

In a one-tailed significance test for a correlation predicted to be positive,the null hypothesis is ______ and the alternative hypothesis is _____.

Accepted Answer

A)    F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 0;   : F1F1F1S1F1F1F10 > 0 
B)    F1F1F1S1F1F1F10  0 
D)    F1F1F1S1F1F1F10  0 
A)    F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 0;   : F1F1F1S1F1F1F10 > 0 
B)    F1F1F1S1F1F1F10  0 
D)    F1F1F1S1F1F1F10  0

Question 14

For a two-tailed test with F1F1F1S1F1F1F10 = 0.05,the   value is

Accepted Answer

A) either +1.96 or -1.96. 
B) both +1.96 and -1.96. 
C) either +1.645 or -1.645. 
D) different for each df. 
A) either +1.96 or -1.96. 
B) both +1.96 and -1.96. 
C) either +1.645 or -1.645. 
D) different for each df.

Question 15

In a study involving 22 participants,you have found that the Pearson correlation coefficient between the amount of Chemical J2 and roller coaster enjoyment is 0.53.Use a two-tailed test and   1 to determine if this is a significant correlation coefficient.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

The alternative hypothesis in a two-tailed significance test of correlation states that

Accepted Answer

A) a correlation exists in the population. 
B) no correlation exists in the population. 
C) a positive correlation exists in the population. 
D) a negative correlation exists in the population. 
A) a correlation exists in the population. 
B) no correlation exists in the population. 
C) a positive correlation exists in the population. 
D) a negative correlation exists in the population.

Question 17

A two-tailed t-test was conducted for   and   .Using   was compared to   .What is the correct 95% confidence interval for   ?

Accepted Answer

A)    
B)    
C)    
D) A confidence interval should not be constructed because the t-test was not significant. 
A)    
B)    
C)    
D) A confidence interval should not be constructed because the t-test was not significant.

Question 18

Suppose you conduct an experiment with 24 subjects and your   turns out to be 2.92,which is statistically significant.Which of the following is the correct way to report your results?

Accepted Answer

A)    = 2.92,p  0.05 
D) t(23)= 2.92,p < 0.05 
A)    = 2.92,p  0.05 
D) t(23)= 2.92,p < 0.05

Question 19

For   and     _____ and   _____ for a two-tailed test with   .

Accepted Answer

A) 2.981;2.093 
B) 2.093;2.981 
C) -2.981;-2.093 
D) -2.093;-2.981 
A) 2.981;2.093 
B) 2.093;2.981 
C) -2.981;-2.093 
D) -2.093;-2.981

Question 20

The major problem with point estimation is that it

Accepted Answer

A) cannot be utilized to estimate population parameters. 
B) cannot be utilized with sample data. 
C) is extremely vulnerable to sampling error. 
D) provides only a single point in its estimate. 
A) cannot be utilized to estimate population parameters. 
B) cannot be utilized with sample data. 
C) is extremely vulnerable to sampling error. 
D) provides only a single point in its estimate.

What happens to the absolute value of as df increases? It

The process of specifying a range of values within which the population parameter is estimated to fall is known as

When we construct a 95% confidence interval,we are 95% sure that the

What happens to the power of a t-test when the variability of the raw scores is increased? The power will

Suppose you conduct an experiment with 20 subjects and the turns out to be 0.69,which is not statistically significant.Which of the following is the correct way to report your results?

Suppose you perform a two-tailed significance test on a correlation using 29 participants.Your is 0.56,which is a significant correlation coefficient.Which of the following is the correct way to report this finding?

If r = 0.72,what proportion of the variance in Y is accounted for by its relationship with X?

When establishing the proper confidence interval for interval estimation,which of the following should be employed?

How is the t-distribution defined?

The confidence interval for a single  is

Degrees of freedom (df)for the one-sample t-test is equal to

The null hypothesis in a two-tailed significance test of correlation states that

In a one-tailed significance test for a correlation predicted to be positive,the null hypothesis is __ and the alternative hypothesis is _.

For a two-tailed test with  = 0.05,the value is

In a study involving 22 participants,you have found that the Pearson correlation coefficient between the amount of Chemical J2 and roller coaster enjoyment is 0.53.Use a two-tailed test and 1 to determine if this is a significant correlation coefficient.

The alternative hypothesis in a two-tailed significance test of correlation states that

A two-tailed t-test was conducted for and .Using was compared to .What is the correct 95% confidence interval for ?

Suppose you conduct an experiment with 24 subjects and your turns out to be 2.92,which is statistically significant.Which of the following is the correct way to report your results?

For and _ and _ for a two-tailed test with .

The major problem with point estimation is that it

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

Exam 11: Performing the One-Sample T-Test and Testing Correlation Coefficients

What happens to the absolute value of as df increases? It

The process of specifying a range of values within which the population parameter is estimated to fall is known as

When we construct a 95% confidence interval,we are 95% sure that the

What happens to the power of a t-test when the variability of the raw scores is increased? The power will

Suppose you conduct an experiment with 20 subjects and the turns out to be 0.69,which is not statistically significant.Which of the following is the correct way to report your results?

Suppose you perform a two-tailed significance test on a correlation using 29 participants.Your is 0.56,which is a significant correlation coefficient.Which of the following is the correct way to report this finding?

If r = 0.72,what proportion of the variance in Y is accounted for by its relationship with X?

When establishing the proper confidence interval for interval estimation,which of the following should be employed?

How is the t-distribution defined?

The confidence interval for a single  is

Degrees of freedom (df)for the one-sample t-test is equal to

The null hypothesis in a two-tailed significance test of correlation states that

In a one-tailed significance test for a correlation predicted to be positive,the null hypothesis is ______ and the alternative hypothesis is _____.

For a two-tailed test with  = 0.05,the value is

In a study involving 22 participants,you have found that the Pearson correlation coefficient between the amount of Chemical J2 and roller coaster enjoyment is 0.53.Use a two-tailed test and 1 to determine if this is a significant correlation coefficient.

The alternative hypothesis in a two-tailed significance test of correlation states that

A two-tailed t-test was conducted for and .Using was compared to .What is the correct 95% confidence interval for ?

Suppose you conduct an experiment with 24 subjects and your turns out to be 2.92,which is statistically significant.Which of the following is the correct way to report your results?

For and _____ and _____ for a two-tailed test with .

The major problem with point estimation is that it

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

In a one-tailed significance test for a correlation predicted to be positive,the null hypothesis is __ and the alternative hypothesis is _.

For and _ and _ for a two-tailed test with .