Question 1

If you find that your standard deviation is 9, then our variance would be 3.

Accepted Answer

A) True 
 B)False  False

Question 2

When data are analyzed in order to make inferences from a smaller group of data to a larger group of data we use which type of statistic?

Accepted Answer

A) inferential statistic 
B) descriptive statistic 
C) quantitative statistic 
D) qualitative statistic 
A) inferential statistic 
B) descriptive statistic 
C) quantitative statistic 
D) qualitative statistic A

Question 3

Which of the following measures how wide or spread out a distribution is?

Accepted Answer

A) mean 
B) median 
C) mode 
D) variance 
A) mean 
B) median 
C) mode 
D) variance D

Question 4

Which of the following is true about the following set of numbers?
100 100 90 46 25 29 13 13

Accepted Answer

A) data are bimodal 
B) mean is 75.32 
C) data are negatively skewed 
D) data are peaked 
A) data are bimodal 
B) mean is 75.32 
C) data are negatively skewed 
D) data are peaked

Question 5

Match each of the following terms with the correct statement.
-Variance

Accepted Answer

A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation. 
A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation.

Question 6

For the following set of numbers, what is the mean (mean = ΣX/N)?
9 - 2 - 8 - 1 - 5

Accepted Answer

A) 5 
B) 25 
C) 8 
D) 23 
A) 5 
B) 25 
C) 8 
D) 23

Question 7

In his study Joey receives a skewness of .54. Which of the following is an accurate statement based on Joey's kurtosis?

Accepted Answer

A) the sample is left (negatively) skewed 
B) the sample is right (positively) skewed 
C) the sample has a tall peak 
D) the sample has a flat peak 
A) the sample is left (negatively) skewed 
B) the sample is right (positively) skewed 
C) the sample has a tall peak 
D) the sample has a flat peak

Question 8

Which of the following is NOT a benefit of statistics?

Accepted Answer

A) Statistics allow us to summarize or describe data. 
B) Statistics enable us to organization information in a meaningful way to make predictions. 
C) Statistics assist us in understanding the world around us. 
D) Statistics allow us to prove theories. 
A) Statistics allow us to summarize or describe data. 
B) Statistics enable us to organization information in a meaningful way to make predictions. 
C) Statistics assist us in understanding the world around us. 
D) Statistics allow us to prove theories.

Question 9

Which of the following is true about the following set of numbers?
100 100 90 46 46 29 13 13

Accepted Answer

A) data are bimodal 
B) mean is 75.32 
C) data are multimodal 
D) data are peaked 
A) data are bimodal 
B) mean is 75.32 
C) data are multimodal 
D) data are peaked

Question 10

Raekwon is in the process of running some basic descriptive statistics. He receives information that his kurtosis is -.57 and his skewness is .80. Based on this information, what can Raekwon say about his sample?

Accepted Answer

A) The sample is tall and not skewed. 
B) The sample is flat and positively skewed. 
C) The sample is tall and positively skewed. 
D) The sample is flat and negatively skewed. 
A) The sample is tall and not skewed. 
B) The sample is flat and positively skewed. 
C) The sample is tall and positively skewed. 
D) The sample is flat and negatively skewed.

Question 11

Match each of the following terms with the correct statement.
-Inferential

Accepted Answer

A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation. 
A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation.

Question 12

In her recent research study, Christina reported a summary of the information/data about the participants. Which type of statistics did Christina use to provide this information?

Accepted Answer

A) inferential statistics 
B) descriptive statistics 
C) quantitative statistics 
D) qualitative statistics 
A) inferential statistics 
B) descriptive statistics 
C) quantitative statistics 
D) qualitative statistics

Question 13

How would you characterize the kurtosis of the following set of numbers?
100 87 36 35 29

Accepted Answer

A) peaked 
B) negatively skewed 
C) positively skewed 
D) flat 
A) peaked 
B) negatively skewed 
C) positively skewed 
D) flat

Question 14

Explain the benefits of using statistics.

Accepted Answer

Statistics provide numerous benefits in

Question 15

Which type of statistic is the standard deviation?

Accepted Answer

A) inferential statistic 
B) descriptive statistic 
C) quantitative statistic 
D) qualitative statistic 
A) inferential statistic 
B) descriptive statistic 
C) quantitative statistic 
D) qualitative statistic

Question 16

What is the mean for the following set of numbers?
100 87 36 35 29

Accepted Answer

A) 57.40 
B) 33.38 
C) -2.79 
D) .66 
A) 57.40 
B) 33.38 
C) -2.79 
D) .66

Question 17

How would you characterize the skewness of the following set of numbers?
100 87 36 35 29

Accepted Answer

A) positively skewed 
B) negatively skewed 
C) peaked 
D) flat 
A) positively skewed 
B) negatively skewed 
C) peaked 
D) flat

Question 18

Match each of the following terms with the correct statement.
-Standard Deviation

Accepted Answer

A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation. 
A) Square root of the variance. 
B) Statistics that are used to make predictions. 
C) ΣX / N 
D) Measures how wide or spread out a distribution is or the average distance of the scores for an interval or ration scale from the mean in squared units. 
E) Any record or observation.

Question 19

Mean, median, and mode are all examples of measures of variance.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is NOT an example of a descriptive statistic?

Accepted Answer

A) grade point average 
B) number of years in school 
C) results from the PRCA-24 
D) gender 
A) grade point average 
B) number of years in school 
C) results from the PRCA-24 
D) gender

Exam 14: Descriptive Statistics

If you find that your standard deviation is 9, then our variance would be 3.

When data are analyzed in order to make inferences from a smaller group of data to a larger group of data we use which type of statistic?

Which of the following measures how wide or spread out a distribution is?

Which of the following is true about the following set of numbers? 100 100 90 46 25 29 13 13

Match each of the following terms with the correct statement. -Variance

For the following set of numbers, what is the mean (mean = ΣX/N)? 9 - 2 - 8 - 1 - 5

In his study Joey receives a skewness of .54. Which of the following is an accurate statement based on Joey's kurtosis?

Which of the following is NOT a benefit of statistics?

Which of the following is true about the following set of numbers? 100 100 90 46 46 29 13 13

Raekwon is in the process of running some basic descriptive statistics. He receives information that his kurtosis is -.57 and his skewness is .80. Based on this information, what can Raekwon say about his sample?

Match each of the following terms with the correct statement. -Inferential

In her recent research study, Christina reported a summary of the information/data about the participants. Which type of statistics did Christina use to provide this information?

How would you characterize the kurtosis of the following set of numbers? 100 87 36 35 29

Explain the benefits of using statistics.

Which type of statistic is the standard deviation?

What is the mean for the following set of numbers? 100 87 36 35 29

How would you characterize the skewness of the following set of numbers? 100 87 36 35 29

Match each of the following terms with the correct statement. -Standard Deviation

Mean, median, and mode are all examples of measures of variance.

Which of the following is NOT an example of a descriptive statistic?

An Introduction to Communication Research

Empirical Research

Research Ethics

Searching for Previous Research and American Psychological Association Style

Research Structure and Literature Reviews

Variables

Measurement

Reliability and Validity

Survey Research

Content Analysis

Experimental Design

Sampling Methods

Hypothesis Testing

Chi-Square 2 Test of Independence

Independent Samples T Tests

One-Way Analysis of Variance

Correlation

Regression

Presenting Research

Statistical Tests and Concepts in Research Analysis

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