Question 1

A researcher might delete a participant's responses when

Accepted Answer

A) the responses from the individual are very extreme or unusual. 
B) no other responses are missing for that participant. 
C) the participant's responses do not correspond with the hypothesis. 
D) the participant gave an above average response to each question. 
A) the responses from the individual are very extreme or unusual. 
B) no other responses are missing for that participant. 
C) the participant's responses do not correspond with the hypothesis. 
D) the participant gave an above average response to each question. A

Question 2

Nominal variables, such as gender and ethnicity, are usually entered into a data analysis program as

Accepted Answer

A) letters corresponding to each level of the variable. 
B) a ratio scale. 
C) numbers corresponding to each level of the variable. 
D) words such as male, female, black, and white. 
A) letters corresponding to each level of the variable. 
B) a ratio scale. 
C) numbers corresponding to each level of the variable. 
D) words such as male, female, black, and white. C

Question 3

Computers are useful for collecting and analyzing statistical data because

Accepted Answer

A) they are less expensive than analyzing data by hand. 
B) they allow p-values to be calculated. 
C) they can decrease calculation errors. 
D) new methods of statistical analysis are not necessary. 
A) they are less expensive than analyzing data by hand. 
B) they allow p-values to be calculated. 
C) they can decrease calculation errors. 
D) new methods of statistical analysis are not necessary. C

Question 4

Which of the following is NOT a method of checking and cleaning the data?

Accepted Answer

A) Comparing the entered data with the original questionnaires 
B) Calculating descriptive statistics 
C) Computing a frequency distribution 
D) Creating new data for participants with missing data 
A) Comparing the entered data with the original questionnaires 
B) Calculating descriptive statistics 
C) Computing a frequency distribution 
D) Creating new data for participants with missing data

Question 5

Which of the following statements is true about a random sample?

Accepted Answer

A) The mean of the sample will be the best guess of the mean of the population, no matter how large the sample is. 
B) The mean of the sample will be the best guess of the mean of the population but only in very large samples. 
C) The mean of the sample will provide the best guess of the mean of the population, but only if the sample is normally distributed. 
D) The mean of the sample will provide the best guess of the mean of the population, but only if there are outliers in the sample. 
A) The mean of the sample will be the best guess of the mean of the population, no matter how large the sample is. 
B) The mean of the sample will be the best guess of the mean of the population but only in very large samples. 
C) The mean of the sample will provide the best guess of the mean of the population, but only if the sample is normally distributed. 
D) The mean of the sample will provide the best guess of the mean of the population, but only if there are outliers in the sample.

Question 6

Which of the following statistics is used to indicate how accurately a sample mean predicts a population mean?

Accepted Answer

A) The sum of squares 
B) The F value 
C) The z score 
D) The confidence interval 
A) The sum of squares 
B) The F value 
C) The z score 
D) The confidence interval

Question 7

After all of the data have been entered into the computer, the first thing that the researcher should do is to

Accepted Answer

A) transform the data. 
B) check and clean the data. 
C) conduct the statistical analyses. 
D) delete responses that do not support the theory. 
A) transform the data. 
B) check and clean the data. 
C) conduct the statistical analyses. 
D) delete responses that do not support the theory.

Question 8

If the lower limit of a confidence interval is 1.5 and the upper limit of a confidence interval is 5.5, we can state that

Accepted Answer

A) a score of 6 is impossible. 
B) 95 percent of the scores should fall between 1.5 and 5.5. 
C) the confidence level is extremely small. 
D) the distribution is normal. 
A) a score of 6 is impossible. 
B) 95 percent of the scores should fall between 1.5 and 5.5. 
C) the confidence level is extremely small. 
D) the distribution is normal.

Question 9

Which measure of central tendency would probably be the most appropriate for analyzing the ratings (on a 1 to 7 scale) of a professor's teaching skills?

Accepted Answer

A) Mean 
B) Mode 
C) Median 
D) Meridian 
A) Mean 
B) Mode 
C) Median 
D) Meridian

Question 10

A professor tells his students the results of the first exam: six students received an A, twelve students received a B, fifteen students received a C, and three students received an F.In statistical terms, this information is a

Accepted Answer

A) measure of variability. 
B) measure of central tendency. 
C) measure of standard deviation. 
D) frequency distribution. 
A) measure of variability. 
B) measure of central tendency. 
C) measure of standard deviation. 
D) frequency distribution.

Question 11

The difference between a person's score on the variable (x) minus the mean of the variable is known as the

Accepted Answer

A) confidence interval. 
B) mean deviation. 
C) degrees of freedom. 
D) margin of error. 
A) confidence interval. 
B) mean deviation. 
C) degrees of freedom. 
D) margin of error.

Question 12

The statement that "Japanese children are more intelligent than American children" is an example of the use of

Accepted Answer

A) inferential statistics. 
B) descriptive statistics. 
C) standard deviations. 
D) frequency distributions. 
A) inferential statistics. 
B) descriptive statistics. 
C) standard deviations. 
D) frequency distributions.

Question 13

The range is equal to the

Accepted Answer

A) mean minus the mode. 
B) maximum score minus the mean. 
C) mean minus the median. 
D) maximum score minus the minimum score. 
A) mean minus the mode. 
B) maximum score minus the mean. 
C) mean minus the median. 
D) maximum score minus the minimum score.

Question 14

For which of the following reasons would data be deleted before the data are analyzed?

Accepted Answer

A) If the data contain outliers 
B) If there are too many participants for analysis 
C) If the participants' answers seem too low 
D) When some of the responses do not support the research hypothesis 
A) If the data contain outliers 
B) If there are too many participants for analysis 
C) If the participants' answers seem too low 
D) When some of the responses do not support the research hypothesis

Question 15

Which of the following is used to specify how precisely the population mean has been estimated?

Accepted Answer

A) The unbiased estimator 
B) The sample mean 
C) The size of the population 
D) The confidence interval 
A) The unbiased estimator 
B) The sample mean 
C) The size of the population 
D) The confidence interval

Question 16

Joe has a score of 8 on a variable that has a mean of 10 and a standard deviation of 2.What is Joe's standard score on the variable?

Accepted Answer

A) 12 
B) -1 
C) 8 
D) -2 
A) 12 
B) -1 
C) 8 
D) -2

Question 17

Descriptive statistics are more precise when the sample is larger.This is predicted by the

Accepted Answer

A) standard error. 
B) central tendency measures. 
C) normal distribution. 
D) central limit theorem. 
A) standard error. 
B) central tendency measures. 
C) normal distribution. 
D) central limit theorem.

Question 18

Which of the following is NOT a reason for deleting the data of a participant?

Accepted Answer

A) The participant's responses were not in the predicted direction. 
B) The participant did not pass the suspicion check. 
C) The participant had a large number of unusual responses. 
D) The participant was not able to perform the necessary task. 
A) The participant's responses were not in the predicted direction. 
B) The participant did not pass the suspicion check. 
C) The participant had a large number of unusual responses. 
D) The participant was not able to perform the necessary task.

Question 19

A grouped frequency distribution is graphically represented using a

Accepted Answer

A) bar chart. 
B) histogram. 
C) polygon. 
D) bell-shaped curve. 
A) bar chart. 
B) histogram. 
C) polygon. 
D) bell-shaped curve.

Question 20

Which of the following is NOT part of preparing data for statistical analysis?

Accepted Answer

A) Entering data into the computer 
B) Computing descriptive statistics 
C) Checking for missing data 
D) Checking the distribution of the population parameters 
A) Entering data into the computer 
B) Computing descriptive statistics 
C) Checking for missing data 
D) Checking the distribution of the population parameters

A researcher might delete a participant's responses when

Nominal variables, such as gender and ethnicity, are usually entered into a data analysis program as

Computers are useful for collecting and analyzing statistical data because

Which of the following is NOT a method of checking and cleaning the data?

Which of the following statements is true about a random sample?

Which of the following statistics is used to indicate how accurately a sample mean predicts a population mean?

After all of the data have been entered into the computer, the first thing that the researcher should do is to

If the lower limit of a confidence interval is 1.5 and the upper limit of a confidence interval is 5.5, we can state that

Which measure of central tendency would probably be the most appropriate for analyzing the ratings (on a 1 to 7 scale) of a professor's teaching skills?

A professor tells his students the results of the first exam: six students received an A, twelve students received a B, fifteen students received a C, and three students received an F.In statistical terms, this information is a

The difference between a person's score on the variable (x) minus the mean of the variable is known as the

The statement that "Japanese children are more intelligent than American children" is an example of the use of

The range is equal to the

For which of the following reasons would data be deleted before the data are analyzed?

Which of the following is used to specify how precisely the population mean has been estimated?

Joe has a score of 8 on a variable that has a mean of 10 and a standard deviation of 2.What is Joe's standard score on the variable?

Descriptive statistics are more precise when the sample is larger.This is predicted by the

Which of the following is NOT a reason for deleting the data of a participant?

A grouped frequency distribution is graphically represented using a

Which of the following is NOT part of preparing data for statistical analysis?

Introduction to Research and Research Designs

The Research Hypothesis

Ethics in Research

Measures

Reliability and Validity

Surveys and Sampling

Naturalistic Methods

Hypothesis Testing and Inferential Statistics

Correlational Research Designs

Experimental Research: One-Way Designs

Experimental Research: Factorial Designs

Experimental Control and Internal Validity

External Validity

Quasi-Experimental Research Designs

Reporting Research Results

Bivariate Statistics

Multivariate Statistics

Filters

Exam 16: Data Preparation and Univariate Statistics

A researcher might delete a participant's responses when

Nominal variables, such as gender and ethnicity, are usually entered into a data analysis program as

Computers are useful for collecting and analyzing statistical data because

Which of the following is NOT a method of checking and cleaning the data?

Which of the following statements is true about a random sample?

Which of the following statistics is used to indicate how accurately a sample mean predicts a population mean?

After all of the data have been entered into the computer, the first thing that the researcher should do is to

If the lower limit of a confidence interval is 1.5 and the upper limit of a confidence interval is 5.5, we can state that

Which measure of central tendency would probably be the most appropriate for analyzing the ratings (on a 1 to 7 scale) of a professor's teaching skills?

A professor tells his students the results of the first exam: six students received an A, twelve students received a B, fifteen students received a C, and three students received an F.In statistical terms, this information is a

The difference between a person's score on the variable (x) minus the mean of the variable is known as the

The statement that "Japanese children are more intelligent than American children" is an example of the use of

The range is equal to the

For which of the following reasons would data be deleted before the data are analyzed?

Which of the following is used to specify how precisely the population mean has been estimated?

Joe has a score of 8 on a variable that has a mean of 10 and a standard deviation of 2.What is Joe's standard score on the variable?

Descriptive statistics are more precise when the sample is larger.This is predicted by the

Which of the following is NOT a reason for deleting the data of a participant?

A grouped frequency distribution is graphically represented using a

Which of the following is NOT part of preparing data for statistical analysis?

Introduction to Research and Research Designs

The Research Hypothesis

Ethics in Research

Measures

Reliability and Validity

Surveys and Sampling

Naturalistic Methods

Hypothesis Testing and Inferential Statistics

Correlational Research Designs

Experimental Research: One-Way Designs

Experimental Research: Factorial Designs

Experimental Control and Internal Validity

External Validity

Quasi-Experimental Research Designs

Reporting Research Results

Bivariate Statistics

Multivariate Statistics

Filters