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Unformatted text preview: orted that for a sample of 50 heartburn sufferers, the mean time to relief
was 3.3 minutes and the standard deviation was 1.1 minutes. Calculate the appropriate test
statistic to test the hypotheses.
A. 1.29
B. 9.09
C. 1.29
D. 2.58
E. 9.09 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 1788 Chapter 01  An Introduction to Business Statistics 89. The manufacturer of an overthecounter heartburn relief mediation claims that its product
brings relief in less than 3.5 minutes, on average. To be able to make this claim the
manufacturer was required by the FDA to present statistical evidence in support of the claim.
The manufacturer reported that for a sample of 50 heartburn sufferers, the mean time to relief
was 3.3 minutes and the standard deviation was 1.1 minutes. Calculate the pvalue that
corresponds to the test statistic.
A. 0.0985
B. 0.0001
C. 0.4015
D. 0.005
E. 0.985 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 90. A company has developed a new inkjet cartridge for its printer that it believes has a
longer lifetime on average than the one currently being produced. To investigate its length of
life, 225 of the new cartridges were tested by counting the number of highquality printed
pages each was able to produce. The sample mean and standard deviation were determined to
be 1511.4 pages and 35.7 pages, respectively. The historical average lifetime for cartridges
produced by the current process is 1502.5 pages. Calculate the appropriate test statistic to test
the hypotheses.
A. 56.09
B. 3.74
C. 22.34
D. 3.74
E. 22.34 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 1789 Chapter 01  An Introduction to Business Statistics 91. A company has developed a new inkjet cartridge for its printer that it believes has a
longer lifetime on average than the one currently being produced. To investigate its length of
life, 225 of the new cartridges were tested by counting the number of highquality printed
pages each was able to produce. The sample mean and standard deviation were determined to
be 1511.4 pages and 35.7 pages, respectively. The historical average lifetime for cartridges
produced by the current process is 1502.5 pages. What is the critical value for α = .05 to test
the hypotheses.
A. 1.645
B. 1.645
C. 1.96
D. 1.28
E. 1.96 AACSB: Analytic
Bloom's: Comprehension
Difficulty: Easy
Topic: Hypothesis testing 92. When 100 randomly selected car owners are surveyed, it is found that the mean length of
time they plan to keep their car is 7.01 years, and the standard deviation is 3.74 years.
Calculate the appropriate test statistic to test the claim that the mean for all car owners is less
than 7.5 years.
A. 13.10
B. 2.53
C. 1.31
D. 1.31
E. 2.53 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 1790 Chapter 01  An Introduction to Business Statistics 93. When 100 randomly selected car owners are surveyed, it is found that the mean length of
time they plan to keep their car is 7.01 years, and the standard deviation is 3.74 years.
Calculate the pvalue for the test statistic used to test the claim that the mean years for all car
owners is less than 7.5 years.
A. 0.0951
B. 0.0951
C. 0.1902
D. 0.0057
E.  0.0057 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 94. In a study of distances traveled by buses before the first major engine failure, a sample of
191 buses results in a mean of 96,700 miles and a standard deviation of 37,500 miles.
Calculate the appropriate test statistic to test the claim that the mean distance traveled before a
major engine failure is more than 90,000 miles.
A. 2.47
B. 34.13
C. 478.16
D. 34.13
E. 2.47 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 1791 Chapter 01  An Introduction to Business Statistics 95. In a study of distances traveled by buses before the first major engine failure, a sample of
191 buses results in a mean of 96,700 miles and a standard deviation of 37,500 miles.
Calculate the pvalue corresponding to the test statistic used to test the claim that the mean
distance traveled before a major engine failure is more than 90,000 miles.
A. 0.0000
B. 0.0068
C. 0.0068
D. 0.0136
E. 0.0136 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 96. Standard xray machines should give radiation dosages below 5.00 mill roentgens. To test
a certain xray machine a sample of 36 observations is taken with a mean of 4.13 m. and a
standard deviation of 1.91 m. Calculate the appropriate test statistic to test the hypotheses.
A. 2.73
B. 3.78
C. 0.455
D. 3.78
E. 2.73 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Topic: Hypothesis testing 1792 Chapter 01  An Introduction to Business Statistics 97. Standard xray machines should give radiation dosages below 5.00 mill roentgens. To test
a certain xray machine a sample of 36 observations is taken with a mean of 4.13...
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 Winter '14

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