Question 1

Write the number of the symbol shown in Column 1 in the space provided to the left of the term in Column 2 that it represents.

Accepted Answer

The answer of Write the number of the symbol shown...

Question 2

As N increases   becomes a _________ estimate of   .

Accepted Answer

A)  better 
B)  worse 
C)  meaningless 
D)  biased 
A)  better 
B)  worse 
C)  meaningless 
D)  biased

Question 3

A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.

Accepted Answer

The answer of A researcher believes that women today weigh...

Question 4

One wishes to investigate the hypothesis that exercise reduces systolic blood pressure. The population mean for the systolic blood pressure of people who do not exercise is 120 mmHg. A sample of 13 members of a local running club has a mean systolic blood pressure of 113 mmHg with a standard deviation of 9.2 mmHg.

Accepted Answer

The answer of One wishes to investigate the hypothesis that...

Question 5

The mean of the t distribution equals _________.

Accepted Answer

A)  0 
B)  1 
C)  N 
D)  N - 1 
A)  0 
B)  1 
C)  N 
D)  N - 1

Question 6

The t test for single samples is used when the population parameters µ and s are unknown.

Accepted Answer

A) True 
 B)False

Question 7

The t test differs from the z test in that _________.

Accepted Answer

A)  with the t test we estimate s 
B)  with the t test we estimate µ 
C)  the z distribution is a family of curves 
D)  the t distribution is a family of curves 
E)  with the t test we estimate s and the t distribution is a family of curves 
A)  with the t test we estimate s 
B)  with the t test we estimate µ 
C)  the z distribution is a family of curves 
D)  the t distribution is a family of curves 
E)  with the t test we estimate s and the t distribution is a family of curves

Question 8

If r = 1.00, then r obt must equal 1.00.

Accepted Answer

A) True 
 B)False

Question 9

The confidence interval for the population mean is _________.

Accepted Answer

A)  a range of values which probably contains the population mean 
B)  a range of values which contains the population mean 
C)  the same from sample-to-sample 
D)  a range of values which probably contains the population mean and the same from sample-to-sample 
A)  a range of values which probably contains the population mean 
B)  a range of values which contains the population mean 
C)  the same from sample-to-sample 
D)  a range of values which probably contains the population mean and the same from sample-to-sample

Question 10

"Degrees of freedom" for any statistic is defined as _________.

Accepted Answer

A)  N 
B)  N - 1 
C)  the number of scores that are free to vary in calculating the statistic 
D)  N - 1and the number of scores that are free to vary in calculating the statistic 
A)  N 
B)  N - 1 
C)  the number of scores that are free to vary in calculating the statistic 
D)  N - 1and the number of scores that are free to vary in calculating the statistic

Question 11

We lose one degree of freedom in calculating _________.

Accepted Answer

A)  s 
B)    
C)  t obt (single sample) 
D)  s and t obt (single sample) 
A)  s 
B)    
C)  t obt (single sample) 
D)  s and t obt (single sample)

Question 12

In general, the z test is more powerful than the t test because _________.

Accepted Answer

A)  with the z test, the sample mean is closer to the population mean than with the t test 
B)  with the t test we lose a degree of freedom 
C)  the standard deviation of the sample raw scores is larger with the t test 
D)  with the z test, we know ó , whereas with the t test, we must estimate it. 
A)  with the z test, the sample mean is closer to the population mean than with the t test 
B)  with the t test we lose a degree of freedom 
C)  the standard deviation of the sample raw scores is larger with the t test 
D)  with the z test, we know ó , whereas with the t test, we must estimate it.

Question 13

The t test requires that the sampling distribution of t be normally distributed.

Accepted Answer

A) True 
 B)False

Question 14

Consider the following set of scores: 102, 102, 106, 105, 104, 104, 107, 108

Accepted Answer

The answer of Consider the following set of scores: 102,...

Question 15

For N = 20, the value of r crit for a = 0.05 2 tail is _________.

Accepted Answer

A)  0.4329 
B)  0.3783 
C)  0.4438 
D)  0.5614 
A)  0.4329 
B)  0.3783 
C)  0.4438 
D)  0.5614

Question 16

The t test is more sensitive than the z test.

Accepted Answer

A) True 
 B)False

Question 17

A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs. What do you conclude, using the appropriate inference test and a = 0.01 1 tail ?

Accepted Answer

A)  accept H 1 
B)  accept H 0 
C)  reject H 0 
D)  retain H 0 
E)  accept H 1 and reject H 0 
A)  accept H 1 
B)  accept H 0 
C)  reject H 0 
D)  retain H 0 
E)  accept H 1 and reject H 0

Question 18

is an estimate of _________.

Accepted Answer

A)  µ 
B)  s 
C)    
D)  s. 
A)  µ 
B)  s 
C)    
D)  s.

Question 19

As the degrees of freedom increase, the correspondence between the t and z distributions _________.

Accepted Answer

A)  increases 
B)  decreases 
C)  remains the same 
D)  cannot be determined 
A)  increases 
B)  decreases 
C)  remains the same 
D)  cannot be determined

Question 20

In general, if r ≠ 0, then r must not equal 0.

Accepted Answer

A) True 
 B)False

Write the number of the symbol shown in Column 1 in the space provided to the left of the term in Column 2 that it represents.

As N increases becomes a _________ estimate of .

The mean of the t distribution equals _________.

The t test for single samples is used when the population parameters µ and s are unknown.

The t test differs from the z test in that _________.

If r = 1.00, then r obt must equal 1.00.

The confidence interval for the population mean is _________.

"Degrees of freedom" for any statistic is defined as _________.

We lose one degree of freedom in calculating _________.

In general, the z test is more powerful than the t test because _________.

The t test requires that the sampling distribution of t be normally distributed.

Consider the following set of scores: 102, 102, 106, 105, 104, 104, 107, 108

For N = 20, the value of r crit for a = 0.05 2 tail is _________.

The t test is more sensitive than the z test.

is an estimate of _________.

As the degrees of freedom increase, the correspondence between the t and z distributions _________.

In general, if r ≠ 0, then r must not equal 0.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

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 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 13: Students T Test for Single Samples

Write the number of the symbol shown in Column 1 in the space provided to the left of the term in Column 2 that it represents.

As N increases becomes a _________ estimate of .

The mean of the t distribution equals _________.

The t test for single samples is used when the population parameters µ and s are unknown.

The t test differs from the z test in that _________.

If r = 1.00, then r obt must equal 1.00.

The confidence interval for the population mean is _________.

"Degrees of freedom" for any statistic is defined as _________.

We lose one degree of freedom in calculating _________.

In general, the z test is more powerful than the t test because _________.

The t test requires that the sampling distribution of t be normally distributed.

Consider the following set of scores: 102, 102, 106, 105, 104, 104, 107, 108

For N = 20, the value of r crit for a = 0.05 2 tail is _________.

The t test is more sensitive than the z test.

is an estimate of _________.

As the degrees of freedom increase, the correspondence between the t and z distributions _________.

In general, if r ≠ 0, then r must not equal 0.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

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 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