Prediction (Optional) Quiz
The question sheet
Reveal any answer as you study-
In the driver deaths data, what is the number of driver deaths (per 100,000) for ages 16–19?
- 28
- 24
- 36
- 38
Reveal answer
Answer: 38
Source evidence
PDF page 745: Age (years) Number of Driver Deaths (per 100,000 people) 16–19 38 20–24 36 25–34 24 35–54 20 55–74 18 75+ 28
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For the 75+ age group, what x value should be used for the midpoint?
- 78
- 85
- 75
- 80
Reveal answer
Answer: 80
Source evidence
PDF page 745: a. For each age group, pick the midpoint of the interval for the x value. For the 75+ group, use 80.
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In the driver deaths analysis, which is the independent variable?
- Age
- Number of deaths
- Year
- Population
Reveal answer
Answer: Age
Source evidence
PDF page 745: b. Using age as the independent variable and number of driver deaths per 100,000 people as the dependent variable,
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In what form should the least-squares line be written for the driver deaths data?
- ŷ = a + bx
- ŷ = bx
- y = a - bx
- y = mx + c
Reveal answer
Answer: ŷ = a + bx
Source evidence
PDF page 745: c. Calculate the least-squares (best–fit) line. Put the equation in the form ŷ = a + bx.
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For the driver deaths data, part e asks to predict deaths for which two ages?
- 16 and 75 years
- 30 and 50 years
- 20 and 80 years
- 40 and 60 years
Reveal answer
Answer: 40 and 60 years
Source evidence
PDF page 745: e. Predict the number of deaths for ages 40 years and 60 years.
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According to the life expectancy data, what was life expectancy for birth year 1930?
- 78.7 years
- 62.9 years
- 59.7 years
- 70.2 years
Reveal answer
Answer: 59.7 years
Source evidence
PDF page 745: Year of Birth Life Expectancy in years 1930 59.7 1940 62.9 1950 70.2 1965 69.7 1973 71.4 1982 74.5 1987 75 1992 75.7 2010 78.7
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In the life expectancy data, what was the value for birth year 2010?
- 75.7
- 78.7
- 71.4
- 74.5
Reveal answer
Answer: 78.7
Source evidence
PDF page 745: Year of Birth Life Expectancy in years 1930 59.7 1940 62.9 1950 70.2 1965 69.7 1973 71.4 1982 74.5 1987 75 1992 75.7 2010 78.7
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For the life expectancy data, part e estimates life expectancy for individuals born in which years?
- 1965 and 1987
- 1930 and 2010
- 1940 and 1992
- 1950 and 1982
Reveal answer
Answer: 1950 and 1982
Source evidence
PDF page 745: e. Find the estimated life expectancy for an individual born in 1950 and for one born in 1982.
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Part j of the life expectancy problem estimates life expectancy for an individual born in which year?
- 2010
- 1850
- 1950
- 1930
Reveal answer
Answer: 1850
Source evidence
PDF page 745: j. Using the least-squares line, find the estimated life expectancy for an individual born in 1850. Does the least-
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In the restaurant data, what is the maximum value for page number 4?
- $16
- $15
- $19
- $17
Reveal answer
Answer: $16
Source evidence
PDF page 746: Page Number Maximum Value ($) 4 16 14 19 25 15 32 17 43 19 57 15 72 16 85 15 90 17
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For the restaurant data, part e estimates maximum values for restaurants on which pages?
- 10 and 70
- 4 and 90
- 32 and 85
- 25 and 57
Reveal answer
Answer: 10 and 70
Source evidence
PDF page 746: e. Find the estimated maximum values for the restaurants on page 10 and on page 70.
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In the swimming gold medal data, what was the time in seconds for 1912?
- 66.8
- 82.2
- 53.1
- 72.4
Reveal answer
Answer: 82.2
Source evidence
PDF page 747: Year Time in seconds 1912 82.2 1924 72.4 1932 66.8 1952 66.8 1960 61.2 1968 60.0 1976 55.65 1984 55.92 1992 54.64 2000 53.8 2008 53.1
High School Statistics
High School Statistics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.
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