Deck 7: Data Collection and Descriptive Statistics

Question 1

What is the mode of 1, 1, 3, 4, 6?

A) 15
B) 1
C) 3
D) 2

Answer 1

B

Question 2

Which of the following is NOT a measure of the degree of spread or dispersion of scores?

A) standard deviation
B) range
C) mode
D) variance

Answer 2

C

Question 3

What is the range of 5, 8, 10, 14, and 11?

A) 48
B) 9.6
C) 10
D) 9

Answer 3

D

Question 4

Which of the following is NOT a step in data collection?

A) the collection of data
B) the designation of a coding strategy
C) the construction of a data collection form
D) the selection of a sample

Question 5

Which is a pitfall of using an optical scanner?

A) It is fast.
B) It is accurate.
C) It is expensive.
D) It can provide additional analysis of items.

Question 6

Which is NOT one of the Ten Commandments of data collection?

A) think of the type of data you will be collecting
B) think about where you are getting the data
C) make sure the data collection form is easy to use
D) destroy original data when your study is finished

Question 7

What is another way the mode can be described?

A) divides the sample in half
B) averages the test scores
C) occurs most frequently
D) tells how much variability there is in the test scores

Question 8

Which measure of variability is the most direct way to measure how dispersed a set of scores is?

A) the mean
B) standard deviation
C) range
D) variance

Question 9

What is the average amount that each score varies from the mean of the set of scores?

A) the range
B) the standard deviation
C) the mean
D) the normal curve

Question 10

What is the best code to use when coding gender?

A) male, female
B) 1, 2
C) M, F
D) Joe, Jane

Question 11

What do you call research data that has not been analyzed and is still in an unorganized format?

A) raw data
B) research data
C) data points
D) descriptive data

Question 12

Which measure of central tendency is most often used when the data has extreme scores?

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

Question 13

When a normal distribution is represented by a histogram, where would most scores fall?

A) in the extremes of the distribution
B) in the middle of the distribution
C) outside of the distribution
D) on the high end of the distribution

Question 14

Which measure of central tendency provides the most information?

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

Question 15

What is the median of 2, 2, 2, 4, 6, 6, 6, and 6?

A) 5
B) 6
C) 4.25
D) 34

Question 16

How can descriptive statistics be defined?

A) describing elements of a distribution
B) relating the data to a larger population
C) developing a research question
D) identical to inferential statistics

Question 17

When computing the standard deviation, what does it mean when the sum of the deviation about the mean is NOT 0?

A) The data set has a great amount of variability.
B) The data set has at least one extreme score.
C) The data is too small.
D) The mean of the data set was computed incorrectly.

Question 18

What is another way to describe a mean?

A) deviation
B) variability
C) average score
D) test statistic

Question 19

Which of the following measures is NOT a measure of central tendency?

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

Question 20

What is the mean of 5, 10, 15, and 20?

A) 3
B) 12.5
C) 25
D) 50

Question 21

In a normal distribution, what percentage of scores fall between the mean and a z-score of +1.00?

A) 16%
B) 34%
C) 50%
D) 95%

Question 22

When you have interval or ratio data such as age in years) what is typically the best measure of central tendency to use?

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

Question 23

Which measure of variability describes the average deviation of each score from the mean?

A) range
B) standard deviation
C) mode
D) mean

Question 24

Which measure would be used to describe how far a test score is from the average test score?

A) mean
B) mode
C) median
D) standard deviation

Question 25

When you have ordinal data such as class rank), which is the best measure of central tendency to use?

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

Question 26

In a set of scores with a mean of 100 and a standard deviation of 15, what raw score is represented by a z-score of 2.00?

A) 115
B) 130
C) 100
D) 70

Question 27

Why isn't the range the best measure of variability?

Question 28

Which measure would be used to determine the average age of college freshmen?
a) mean
b) mode
c) median
d) standard deviation

Question 29

Why should we use standard scores instead of raw scores?

Question 30

What is a measure of central tendency?

Question 31

What is the difference between the mean, median, and mode?

Question 32

What measure would be used to compute the average gender of subjects?

A) mean
B) mode
C) median
D) standard deviation

Question 33

In a set of scores with a mean of 50 and a standard deviation of 5, what raw score is represented by a z-score of 1.00?

A) 30
B) 55
C) 60
D) 20

Question 34

Why is the sum of the deviation about the mean always 0?

Question 35

What is another phrase used to describe a bell-shaped curve?

A) average curve
B) regular-shaped curve
C) normal curve
D) elliptical curve

Question 36

Give an example of when you would use the median as the measure of central tendency.

Question 37

You are interviewing classmates to find out their political party affiliation. When you chose the measure of central tendency to use in presenting your results, which should you choose?

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

Question 38

When comparing the following two distributions, which of the following statements is true? Data Set #1: 10, 15, 20, 25, 30
Data Set #2: 16, 18, 20, 22, 24

A) Data Set #1 has a smaller mean than Data Set #2.
B) Data Set #1 has a larger standard deviation than Data Set #2.
C) Both data sets have the same range.
D) The mean is larger than the median in both data sets.

Question 39

Which measure would be used to describe the average class ranking of algebra students?

A) mean
B) mode
C) median
D) standard deviation

Question 40

What are some characteristics of a normal curve?