Deck 8: Making Sense of the Numbers

Question 1

The ________ represents how far the scores are, on average, from the mean.

A)Standard error
B)Standard rate
C)Standard movement
D)Standard deviation

Answer 1

D

Question 2

Which of the following is equal to the square of the standard deviation?

A)Z-score
B)Variance
C)Mean
D)Median

Answer 2

B

Question 3

The ____ is the standard deviation divided by the mean, and is useful when making comparisons across variables with different scales or units.

A)R-quared
B)Mendel's test
C)Coefficient of variation
D)Coefficient of probability

Answer 3

C

Question 4

The number of successes divided by the number of failures is defined as the:

A)Rate
B)Count
C)Odds
D)Odds ratio

Question 5

Which is not used with quantitative or continuous variables?

A)Histogram
B)Cross tabulation
C)Simple regression
D)Scatter plot

Question 6

A museum director received an evaluation that estimated that a new advertising campaign increased museum visits between 2 and 8 percent (with 95 percent confidence) .The director decided this was not enough visitors to be worth the effort, so the campaign was discontinueD. According to the director, which of the following was lacking in the relationship between the campaign and the number of museum visits?

A)Statistical significance
B)Practical significance
C)Reliability
D)Validity

Question 7

Which would you NOT use to show how many people live in each of four different regions of the United States (Midwest, North, South, West)?

A)Histogram
B)Bar chart
C)Pie chart
D)Frequency distribution

Question 8

A researcher measured the body mass index (BMI) of a large sample of adolescents in an urban school system .(BMI is the ratio of a person's weight in kilos divided by the square of their height in meters.) Which would you use to show the distribution of BMI?

A)Histogram
B)Bar chart
C)Pie chart
D)Frequency distribution

Question 9

In a small rural town, everyone has a high school diploma, but one resident has a master's degree .How would you refer to this one case?

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

Question 10

Which of the following would you use to show the relationship between age (in years) and income (in dollars)?

A)Histogram
B)Odds ratio
C)Coefficient of variation
D)Scatter plot

Question 11

The ______ is a measure of the center of a distribution, such as average height or weight.

A)Mode
B)Function
C)Mean
D)Dataset

Question 12

The number or share of a population that has a particular condition is called

A)Incidence
B)Prevalence
C)Odds
D)Odds ratio

Question 13

_____ are scores on a variable converted to standard deviation units.

A)c-scores
B)y-scores
C)z-Scores
D)d-Scores

Question 14

Researchers can better understand the distribution of a categorical variable by counting the number of individuals or cases in each category .This is referred to as the:

A)Relative distribution
B)Counted distribution
C)Frequency distribution
D)None of the above

Question 15

____ refers to very high or very low scores, which have a large influence on the mean.

A)Skewness
B)Modeness
C)Push factor
D)All of the above

Question 16

In a study of employees, 20 percent of the variation in job satisfaction can be explained by variation in the pay the employees receive .The 20 percent figure is referred to as

A)Residual
B)Regression coefficient
C)R-squared
D)Correlation

Question 17

A researcher calculated the correlation, Pearson r, between two variables in order to measure the strength of the relationship between the two variables, and it to be close +1, meaning that there was a ________ positive relationship.

A)Strong
B)Weak
C)Nonexistent
D)Unclear

Question 18

The rate at which new cases of a disease or phenomenon appear in a population is referred to as the:

A)Incidence
B)Regularity
C)Disparity
D)Relativity