AP Stats Chapter 3

AP Stats Chapter 3

12th Grade

15 Qs

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AP Stats Chapter 3

AP Stats Chapter 3

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Easy

Created by

Anthony Clark

Used 1+ times

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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If bivariate data set A has correlation r = 0.95, and a second bivariate data set B has correlation r = –0.95, then

a linear model does a better job of describing the relationship between the variables in data set A than in data set B.

a linear model does a better job of describing the relationship between the variables in data set B than in data set A.

a linear model is the best description of the relationship between the variables in both data set A and data set B.

you can’t tell whether either data set is best described by a linear model until you examine the scatterplots.

a mistake has been made—r cannot be negative.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A copy machine dealer has data on the number of copy machines x at each of 89 customer locations and the number of service calls in a month y at each location. Summary calculations give x̅= 8.4, sx= 2.1, y̅= 14.2, sy= 3.8, and r = 0.86. What is the slope of the least-squares regression line of number of service calls on number of copiers?

0.86

1.56

0.48

2.82

cannot tell from the information given

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Suppose we fit a least-squares regression line to a set of data. What is true if a plot of the residuals shows a curved pattern?

a straight line is not a good model for the data

the correlation must be 0

the correlation must be positive

outliers must be present

The regression line might or might not be a good model for the data, depending on the extent of the curve.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This table displays counts and percentages of individuals falling into named categories on two or more variables

Frequency table

Relative Frequency table

Contingency table

Data table

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a contingency table, the distribution of one variable for just the cases that satisfy another variable (either by row or by column)

Marginal distribution

Conditional distribution

Independent distribution

Frequency distribution

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A display with bars used for quantitative data that shows frequency for each bin

Histogram

Bar Chart

Pie Chart

Segmented Bar Chart

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A distribution where each side is a mirror image of the other and is roughly bell-shaped

Uniform

Skewed

Asymmetric

Symmetric

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