Question 1

If we conclude that there is a significant correlation in the population we may be making a Type I error.

Accepted Answer

A) True 
 B)False

Question 2

gives a value in raw score units for the size of effect.

Accepted Answer

A) True 
 B)False

Question 3

Assume that you have just calculated the correlation coefficient from an experiment with N = 16 pairs of observations. The value of r obt is 0.493.

Accepted Answer

The answer of Assume that you have just calculated the...

Question 4

The 95% confidence interval of the mean for   = 13.0, s = 1.6, and N = 21 is _________.

Accepted Answer

A)  12.01 to 13.99 
B)  12.27 to 13.73 
C)  11.05 to 15.05 
D)  12.95 to 14.95 
A)  12.01 to 13.99 
B)  12.27 to 13.73 
C)  11.05 to 15.05 
D)  12.95 to 14.95

Question 5

Define critical value(s) of t.

Accepted Answer

The critical value(s) of t, often denote

Question 6

The average growth per day of a certain type lawn seed using standard fertilizer is 2.6 inches per week. You wish to test the effects of a fertilizer on growth rate. You add fertilizer to several different patches of grass grown from that seed and observe the following results:

Accepted Answer

The answer of The average growth per day of a...

Question 7

There are two values for t crit when H 1 is directional.

Accepted Answer

A) True 
 B)False

Question 8

If r = - 0.10 and N = 8, r cannot equal +0.10.

Accepted Answer

A) True 
 B)False

Question 9

Which of the characteristics below distinguishes the t statistic from the z statistic?

Accepted Answer

A)  the proportion of area beyond a particular positive t value is equal to the proportion of area below the corresponding negative t 
B)  the z distribution has a mean of zero while the t distribution does not 
C)  In the t distribution the area under the curve beyond a value of ±1.96 is greater than that of the normal curve 
D)  all of these 
A)  the proportion of area beyond a particular positive t value is equal to the proportion of area below the corresponding negative t 
B)  the z distribution has a mean of zero while the t distribution does not 
C)  In the t distribution the area under the curve beyond a value of ±1.96 is greater than that of the normal curve 
D)  all of these

Question 10

What are the critical values of t for each of the following values of N and alpha using a nondirectional hypothesis?

Accepted Answer

The answer of What are the critical values of t...

Question 11

The confidence interval is one example of point estimation.

Accepted Answer

A) True 
 B)False

Question 12

One of the undergraduate advisors at a state university wants to estimate the average number of hours freshman business majors at her school spend studying each week. He randomly samples 25 freshman business majors from the freshman business majors attending that semester and measures how many hours each spends studying for a three week period. She then averages the results. The results show a mean of 24 hrs/week and a standard deviation of 4.6 hrs/week.

Accepted Answer

The answer of One of the undergraduate advisors at a...

Question 13

In a correlative study, _________.

Accepted Answer

A)  a value of r ≠ 0 in the sample, means that there is a nonzero correlation in the population 
B)  a nondirectional alternative hypothesis states that r ≠ 0 
C)  the null hypothesis for a nondirectional alternative hypothesis states that r = 0 
D)  a nondirectional alternative hypothesis states that r = 0 
E)  a nondirectional alternative hypothesis states that r ≠0 and the null hypothesis for a nondirectional alternative hypothesis states that r = 0 
A)  a value of r ≠ 0 in the sample, means that there is a nonzero correlation in the population 
B)  a nondirectional alternative hypothesis states that r ≠ 0 
C)  the null hypothesis for a nondirectional alternative hypothesis states that r = 0 
D)  a nondirectional alternative hypothesis states that r = 0 
E)  a nondirectional alternative hypothesis states that r ≠0 and the null hypothesis for a nondirectional alternative hypothesis states that r = 0

Question 14

t crit must always be positive.

Accepted Answer

A) True 
 B)False

Question 15

If the population parameters are known, the t test is _________ powerful than the z test.

Accepted Answer

A)  more 
B)  less 
C)  equally 
D)  need more information 
A)  more 
B)  less 
C)  equally 
D)  need more information

Question 16

Define confidence interval and confidence limits.

Accepted Answer

A confidence interval is a range of valu

Question 17

Describe the characteristics of the sampling distribution of t .

Accepted Answer

The sampling distribution of t is a prob

Question 18

In the t test s is used to estimate s .

Accepted Answer

A) True 
 B)False

Question 19

With which statistical test do we determine the probability of getting the obtained results or those more extreme assuming the differences in results were due to chance alone?

Accepted Answer

A)  sign test 
B)  z test 
C)  t test 
D)  all of these 
A)  sign test 
B)  z test 
C)  t test 
D)  all of these

Question 20

In general t crit is greater than z crit at the same a level.

Accepted Answer

A) True 
 B)False

If we conclude that there is a significant correlation in the population we may be making a Type I error.

gives a value in raw score units for the size of effect.

Assume that you have just calculated the correlation coefficient from an experiment with N = 16 pairs of observations. The value of r obt is 0.493.

The 95% confidence interval of the mean for = 13.0, s = 1.6, and N = 21 is _________.

Define critical value(s) of t.

The average growth per day of a certain type lawn seed using standard fertilizer is 2.6 inches per week. You wish to test the effects of a fertilizer on growth rate. You add fertilizer to several different patches of grass grown from that seed and observe the following results:

There are two values for t crit when H 1 is directional.

If r = - 0.10 and N = 8, r cannot equal +0.10.

Which of the characteristics below distinguishes the t statistic from the z statistic?

What are the critical values of t for each of the following values of N and alpha using a nondirectional hypothesis?

The confidence interval is one example of point estimation.

In a correlative study, _________.

t crit must always be positive.

If the population parameters are known, the t test is _________ powerful than the z test.

Define confidence interval and confidence limits.

Describe the characteristics of the sampling distribution of t .

In the t test s is used to estimate s .

With which statistical test do we determine the probability of getting the obtained results or those more extreme assuming the differences in results were due to chance alone?

In general t crit is greater than z crit at the same a level.

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

If we conclude that there is a significant correlation in the population we may be making a Type I error.

gives a value in raw score units for the size of effect.

Assume that you have just calculated the correlation coefficient from an experiment with N = 16 pairs of observations. The value of r obt is 0.493.

The 95% confidence interval of the mean for = 13.0, s = 1.6, and N = 21 is _________.

Define critical value(s) of t.

The average growth per day of a certain type lawn seed using standard fertilizer is 2.6 inches per week. You wish to test the effects of a fertilizer on growth rate. You add fertilizer to several different patches of grass grown from that seed and observe the following results:

There are two values for t crit when H 1 is directional.

If r = - 0.10 and N = 8, r cannot equal +0.10.

Which of the characteristics below distinguishes the t statistic from the z statistic?

What are the critical values of t for each of the following values of N and alpha using a nondirectional hypothesis?

The confidence interval is one example of point estimation.

In a correlative study, _________.

t crit must always be positive.

If the population parameters are known, the t test is _________ powerful than the z test.

Define confidence interval and confidence limits.

Describe the characteristics of the sampling distribution of t .

In the t test s is used to estimate s .

With which statistical test do we determine the probability of getting the obtained results or those more extreme assuming the differences in results were due to chance alone?

In general t crit is greater than z crit at the same a level.

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