Question 1

Which of the following is not an assumption of the z test?​

Accepted Answer

A) The population mean (m) and standard deviation (s) are known. 
B) The data are interval or ratio. 
C) The distribution of random samples is normal. 
D) The sample size is less than 30. 
A) The population mean (m) and standard deviation (s) are known. 
B) The data are interval or ratio. 
C) The distribution of random samples is normal. 
D) The sample size is less than 30. D

Question 2

A researcher is interested in whether students who are musicians have higher intelligence test scores than students in the general population. The researcher predicts that playing a musical instrument is associated with higher intelligence test scores. The researcher selects a sample of 75 musicians from local high schools and gives them an intelligence test. The mean for the sample is 105. The mean for the general population (µ) is 100 with a standard deviation (s) of 15. What is zobt for this sample?​

Accepted Answer

A) 0.33 
B) 1.89 
C) 2.89 
D) 3.25 
A) 0.33 
B) 1.89 
C) 2.89 
D) 3.25 C

Question 3

How does sample size affect the tcv?​

Accepted Answer

As sample size increases, the df increases and the t_cv decreases. Thus, larger sample sizes will require smaller t_cvs in order to be significant.

Question 4

How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?​

Accepted Answer

A t test differs from a z test in that s

Question 5

A distribution of sample means based on random samples of a fixed size from a population is the _____.​

Accepted Answer

A) standard error of the mean 
B) z test 
C) population distribution 
D) sampling distribution 
A) standard error of the mean 
B) z test 
C) population distribution 
D) sampling distribution

Question 6

What is the sampling distribution and how is it related to the standard error of the mean?​

Accepted Answer

​The sampling distribution is a distribu

Question 7

What is the standard error of the mean for a distribution of scores where s = 50 and n = 75?​

Accepted Answer

A) 5.77 
B) 0.066 
C) 1.5 
D) unable to determine 
A) 5.77 
B) 0.066 
C) 1.5 
D) unable to determine

Question 8

A researcher is interested in whether students who attend private elementary schools do any better on a standard test of intelligence than the general population of elementary school children. A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5. The average for the general population of elementary school children is 100 (s = 15).​

Accepted Answer

a) Is this a one- or a two-tailed test?

Question 9

A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known is the

Accepted Answer

A) z test. 
B) t test. 
C) Cohen's d.​ 
D) standard error of the mean. 
A) z test. 
B) t test. 
C) Cohen's d.​ 
D) standard error of the mean.

Question 10

A researcher is interested in whether high school students who play sports have a higher or lower body mass index (BMI) than students in the general population. The researcher is unsure whether playing sports will decrease body mass (due to more calories burned) or increase body mass (due to more muscle mass). He compares their average BMI to that of students in the general population and finds that zobt = +1.92. This is a _____ test and the researcher should conclude _____.​

Accepted Answer

A) one-tailed; that students who are athletes have significantly higher BMIs. 
B) two-tailed; that students who are athletes have significantly higher BMIs. 
C) one-tailed: that students who are athletes do not have significantly higher BMIs. 
D) two-tailed: that students who are athletes do not have significantly higher BMIs. 
A) one-tailed; that students who are athletes have significantly higher BMIs. 
B) two-tailed; that students who are athletes have significantly higher BMIs. 
C) one-tailed: that students who are athletes do not have significantly higher BMIs. 
D) two-tailed: that students who are athletes do not have significantly higher BMIs.

Question 11

If a researcher reported for a two-tailed single-sample t test that t(10) = 2.25, then​

Accepted Answer

A) p < 0.03 
B) p < 0.05. 
C) ​p < 0.02 
D) p < 0.001. 
A) p < 0.03 
B) p < 0.05. 
C) ​p < 0.02 
D) p < 0.001.

Question 12

What are the assumptions of the t test?​

Accepted Answer

​The t test is based on a bell

Question 13

Imagine that you conducted a single-sample t test with 8 participants. For a two-tailed test, the tcv at a = 0.05 would be​

Accepted Answer

A) ±1.796. 
B) ±2.365. 
C) ±2.179. 
D) ±2.201. 
A) ±1.796. 
B) ±2.365. 
C) ±2.179. 
D) ±2.201.

Question 14

If a researcher reported for a two-tailed single-sample t test that t(13) = 1.46, then

Accepted Answer

A) p < 0.02 
B) p < 0.05. 
C) ​p < 0.01 
D) the results is not significant. 
A) p < 0.02 
B) p < 0.05. 
C) ​p < 0.01 
D) the results is not significant.

Question 15

The set of distributions that, although symmetrical and bell-shaped, are not normally distributed is known as

Accepted Answer

A) Student's t distribution.​ 
B) Gosset's t distribution. 
C) the z distribution. 
D) none of the options is correct 
A) Student's t distribution.​ 
B) Gosset's t distribution. 
C) the z distribution. 
D) none of the options is correct

Question 16

The standard deviation of the sampling distribution is called the​

Accepted Answer

A) standard deviation. 
B) deviation of the sample. 
C) standard error of the mean. 
D) standard error of the population. 
A) standard deviation. 
B) deviation of the sample. 
C) standard error of the mean. 
D) standard error of the population.

Question 17

Imagine that you conducted a single-sample t test with 15 participants. For a one-tailed test, the tcv at a = 0.05 would be​

Accepted Answer

A) ±1.761. 
B) ±1.753. 
C) ±2.179. 
D) ±2.201. 
A) ±1.761. 
B) ±1.753. 
C) ±2.179. 
D) ±2.201.

Question 18

For a single-sample t test with 12 participants, the degrees of freedom are​

Accepted Answer

A) 10.​ 
B) 11. 
C) 12. 
D) unable to be determined. 
A) 10.​ 
B) 11. 
C) 12. 
D) unable to be determined.

Question 19

If a researcher reported for a single-sample t test that t(17) = 2.90, p​

Accepted Answer

A) 18 
B) 20 
C) 10 
D) 9 
A) 18 
B) 20 
C) 10 
D) 9

Question 20

Imagine that you conducted a single-sample t test with 12 participants. For a two-tailed test, the tcv at a = 0.05 would be​

Accepted Answer

A) ±1.796. 
B) ±2.074. 
C) ±2.179. 
D) ±2.201. 
A) ±1.796. 
B) ±2.074. 
C) ±2.179. 
D) ±2.201.

Which of the following is not an assumption of the z test?

How does sample size affect the t_cv?

How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?

A distribution of sample means based on random samples of a fixed size from a population is the _____.

What is the sampling distribution and how is it related to the standard error of the mean?

What is the standard error of the mean for a distribution of scores where s = 50 and n = 75?

A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known is the

If a researcher reported for a two-tailed single-sample t test that t(10) = 2.25, then

What are the assumptions of the t test?

Imagine that you conducted a single-sample t test with 8 participants. For a two-tailed test, the t_cv at a = 0.05 would be

If a researcher reported for a two-tailed single-sample t test that t(13) = 1.46, then

The set of distributions that, although symmetrical and bell-shaped, are not normally distributed is known as

The standard deviation of the sampling distribution is called the

Imagine that you conducted a single-sample t test with 15 participants. For a one-tailed test, the t_cv at a = 0.05 would be

For a single-sample t test with 12 participants, the degrees of freedom are

If a researcher reported for a single-sample t test that t(17) = 2.90, p

Imagine that you conducted a single-sample t test with 12 participants. For a two-tailed test, the t_cv at a = 0.05 would be

Thinking Like a Scientist

Getting Started

Defining Measuring and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Probability and Hypothesis Testing

Experimental Design and Analysis I

Experimental Design and Analysis II

Experimental Design and Analysis III

Experimental Design and Analysis Iv

Quasi Experimental and Single Case Designs

Nonparametric Inferential Statistics

APA Communication Guidelines

Filters

Exam 8: Introduction to Inferential Statistics

Which of the following is not an assumption of the z test?​

How does sample size affect the tcv?​

How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?​

A distribution of sample means based on random samples of a fixed size from a population is the _____.​

What is the sampling distribution and how is it related to the standard error of the mean?​

What is the standard error of the mean for a distribution of scores where s = 50 and n = 75?​

A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known is the

If a researcher reported for a two-tailed single-sample t test that t(10) = 2.25, then​

What are the assumptions of the t test?​

Imagine that you conducted a single-sample t test with 8 participants. For a two-tailed test, the tcv at a = 0.05 would be​

If a researcher reported for a two-tailed single-sample t test that t(13) = 1.46, then

The set of distributions that, although symmetrical and bell-shaped, are not normally distributed is known as

The standard deviation of the sampling distribution is called the​

Imagine that you conducted a single-sample t test with 15 participants. For a one-tailed test, the tcv at a = 0.05 would be​

For a single-sample t test with 12 participants, the degrees of freedom are​

If a researcher reported for a single-sample t test that t(17) = 2.90, p​

Imagine that you conducted a single-sample t test with 12 participants. For a two-tailed test, the tcv at a = 0.05 would be​

Thinking Like a Scientist

Getting Started

Defining Measuring and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Probability and Hypothesis Testing

Experimental Design and Analysis I

Experimental Design and Analysis II

Experimental Design and Analysis III

Experimental Design and Analysis Iv

Quasi Experimental and Single Case Designs

Nonparametric Inferential Statistics

APA Communication Guidelines

Filters

Which of the following is not an assumption of the z test?

How does sample size affect the t_cv?

How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?

A distribution of sample means based on random samples of a fixed size from a population is the _____.

What is the sampling distribution and how is it related to the standard error of the mean?

What is the standard error of the mean for a distribution of scores where s = 50 and n = 75?

If a researcher reported for a two-tailed single-sample t test that t(10) = 2.25, then

What are the assumptions of the t test?

Imagine that you conducted a single-sample t test with 8 participants. For a two-tailed test, the t_cv at a = 0.05 would be

The standard deviation of the sampling distribution is called the

Imagine that you conducted a single-sample t test with 15 participants. For a one-tailed test, the t_cv at a = 0.05 would be

For a single-sample t test with 12 participants, the degrees of freedom are

If a researcher reported for a single-sample t test that t(17) = 2.90, p

Imagine that you conducted a single-sample t test with 12 participants. For a two-tailed test, the t_cv at a = 0.05 would be