Unformatted text preview: ation of 1.2 ounces. What is the
probability of finding an average in excess of 4.3 ounces of this ingredient from randomly
inspected 100 gallons of regular unleaded gasoline?
A. .5987
B. .4013
C. .9938
D. .0062 101. The chief chemist for a major oil/gasoline production company claims that the regular
unleaded gasoline produced by the company contains on average 4 ounces of a certain
ingredient. The chemist further states that the distribution of this ingredient per gallon of
regular unleaded gasoline is normal and has a standard deviation of 1.2 ounces. What is the
probability of finding an average less than 3.85 ounces of this ingredient from randomly
inspected 64 gallons of regular unleaded gasoline?
A. .1587
B. .8413
C. .1357
D. .8643 1559 Chapter 01  An Introduction to Business Statistics 102. In the upcoming governor's election, the most recent poll based on 900 respondents
predicts that the incumbent will be reelected with 55% of the votes. From the 900
respondents, how many indicated that they would not vote for the current governor or
indicated that they were undecided?
A. 495
B. 450
C. 405
D. 400 103. In the upcoming governor's election, the most recent poll based on 900 respondents
predicts that the incumbent will be reelected with 55% of the votes. What is
A. .00825
B. .0166
C. .0247
D. .0003 ? 104. In the upcoming governor's election, the most recent poll based on 900 respondents
predicts that the incumbent will be reelected with 55% of the votes. For the sake of argument,
assume that 51% of the actual voters in the state support the incumbent governor (p = 0.51).
Calculate the probability of observing a sample proportion of voters 0.55 or higher supporting
the incumbent governor.
A. 0166
B. 0247
C. 0082
D. 9918 105. It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 23 download times are selected
describe the shape of the sampling distribution and how it was determined.
A. Normal, size of sample meets the Central Limit Theorem requirement
B. Normal, the original population is normal
C. Skewed, the original population is not a normal distribution
D. Cannot be determined with the information that is given 1560 Chapter 01  An Introduction to Business Statistics 106. It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected
calculate the mean of the sampling distribution of the sampling mean.
A. 0.3
B. 0.15
C. 0.9
D. 0.05 107. It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected
calculate the standard deviation of the sampling distribution of the sample mean.
A. 0.3
B. 0.15
C. 0.9
D. 0.05 108. It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected 80%
of the sample means will be between what two values symmetrically distributed around the
population mean.
A. [.648 1.152]
B. [.836 .964]
C. [.514 1.280]
D. [.858 .942] 109. It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected, what
is the probability that the sample mean will be less than 0.84 seconds?
A. .1151
B. .4522
C. .8849
D. .5478 1561 Chapter 01  An Introduction to Business Statistics 110. The College Student Journal (December 1992) investigated differences in traditional and
nontraditional students, where nontraditional students are defined as 25 years or older and
working. Based on the study results, we can assume the population mean and standard
deviation for the GPA of nontraditional students is µ = 3.5 and σ = 0.5. Suppose a random
sample of 100 nontraditional students is selected and each student's GPA is calculated. What
is
?
A. 0.5
B. 3.5
C. 7.0
D. 0.05 111. The College Student Journal (December 1992) investigated differences in traditional and
nontraditional students, where nontraditional students are defined as 25 years or older and
working. Based on the study results, we can assume the population mean and standard
deviation for the GPA of nontraditional students is µ = 3.5 and σ = 0.5. Suppose a random
sample of 100 nontraditional students is selected and each student's GPA is calculated.
Calculated
A. 0.5
B. 3.5
C. 7.0
D. 0.05 112. The College St...
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