Deck 14: Descriptive Statistics

Question 1

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?

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

Answer 1

B

Question 2

Which of the following is NOT a benefit of statistics?

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.

Answer 2

D

Question 3

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

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

Answer 3

A

Question 4

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

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

Question 5

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

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

Question 6

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

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

Question 7

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

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

Question 8

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

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

Question 9

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?

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

Question 10

When data are analyzed in order to make inferences from a smaller group of data to a larger group of data, the larger group of data is referred to as the

A)sample
B)pool of participants
C)population
D)data pool

Question 11

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

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

Question 12

Which type of statistic is the standard deviation?

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

Question 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?

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 14

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

A)57.40
B)33.38
C)-2.79
D)36

Question 15

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

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

Question 16

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

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

Question 17

In Janell's study, she finds the sum of squares for her variable is 20. She also has five participants in her study. What is her variance (s² = SS/ (N - 1.)?

A)20
B)5
C)4
D)1

Question 18

To create a _______________, simply record the number of occurrences for each value in the dataset.

A)frequency distribution
B)inferential statistic
C)measure of central tendency
D)sample statistic

Question 19

In his study Joey receives a kurtosis of .87. Which of the following is an accurate statement based on Joey's kurtosis?

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 20

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

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 21

Kurtosis lets a researcher know whether or not her or his data are flat or peaked.

Question 22

Inferential statistical tests allow researchers to make inferences about some unknown aspect of a sample from a population.

Question 23

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

Question 24

If a data set has two modes, it is said to be bimodal.

Question 25

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

Question 26

A sample is used to best represent a portion of the population.

Question 27

Mode is defined as the middle value in a list of data.

Question 28

Explain the benefits of using statistics.

Question 29

What are measures of variability?

Question 30

Explain the purpose of skewness and kurtosis.

Question 31

Distinguish between descriptive and inferential statistics.

Question 32

What variables are usually analyzed using descriptive statistics? In what section of a research study might audiences find descriptive statics reported?

Question 33

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

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 34

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

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 35

Match each of the following terms with the correct statement.
-Population Mean

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 36

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

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 37

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