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Unformatted text preview: of 1000 adults from the U.S.A and 1000 adults
from Germany were asked whether they supported the death penalty. 590 American adults
and 560 German adults indicated that they supported the death penalty. The researcher wants
to know if there is sufficient evidence to conclude that the proportion of adults who support
the death penalty is higher in the U.S.A. than in Germany. What is the decision at
= .10?
A. Reject the null hypothesis
B. Can't reject the null hypothesis 112. In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults
from Germany were asked whether they supported the death penalty. 590 American adults
and 560 German adults indicated that they supported the death penalty. The researcher wants
to know if there is sufficient evidence to conclude that the proportion of adults who support
the death penalty is higher in the U.S.A. than in Germany. What is the decision at
= .05?
A. Reject the null hypothesis
B. Can't reject the null hypothesis 113. In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults
from Germany were asked whether they supported the death penalty. 590 American adults
and 560 German adults indicated that they supported the death penalty. The researcher wants
to know if there is sufficient evidence to conclude that the proportion of adults who support
the death penalty is higher in the U.S.A. than in Germany. What is the pvalue for this test?
A. 0.003
B. 0.1738
C. 0.0869
D. 0.0274 114. Find a 95 percent confidence interval for the difference between the proportions of
people who prefer cola versus root beer (RB) where
150.
A. (0.018 0.198)
B. (0.0255 0.1545)
C. (0.073 0.107)
D. (0.013 0.167) 1847 cola = .21, = .12, ncola = 200, nRB = RB Chapter 01  An Introduction to Business Statistics 115. The middistance running coach, Zdravko Popovich, for the Olympic team of an eastern
European country claims that his sixmonth training program significantly reduces the
average time to complete a 1500meter run. Five middistance runners were randomly
selected before they were trained with coach Popovich's sixmonth training program and their
completion time of 1500meter run was recorded (in minutes). After six months of training
under coach Popovich, the same five runners' 1500 meter run time was recorded again the
results are given below. At an alpha level of .05, can we conclude that there has been a significant decrease in the
mean time per mile?
A. Reject the null hypothesis
B. Can't reject the null hypothesis 116. The middistance running coach, Zdravko Popovich, for the Olympic team of an eastern
European country claims that his sixmonth training program significantly reduces the
average time to complete a 1500meter run. Five middistance runners were randomly
selected before they were trained with coach Popovich's sixmonth training program and their
completion time of 1500meter run was recorded (in minutes). After six months of training
under coach Popovich, the same five runners' 1500 meter run time was recorded again the
results are given below. Construct the appropriate 95% confidence interval. (sd = .228)
A. (0.063 0.497)
B. (0.206 0.766)
C. (0.003 0.563)
D. (0.018 0.542) 1848 Chapter 01  An Introduction to Business Statistics 117. A marketing research company surveyed grocery shoppers in the east and west coasts to
see the percentage of the customers who prefer chicken to other meat. The data are given
below. Is the proportion of customers who prefer chicken the same for the two regions? Test at α = .
10.
A. Reject the null hypothesis
B. Can't reject the null hypothesis 118. A marketing research company surveyed grocery shoppers in the east and west coasts to
see the percentage of the customers who prefer chicken to other meat. The data are given
below. Is the proportion of customers who prefer chicken higher at the West Coast? Test at
05.
A. Reject H0
B. Fail to reject H0 1849 =. Chapter 01  An Introduction to Business Statistics 119. A marketing research company surveyed grocery shoppers in the east and west coasts to
see the percentage of the customers who prefer chicken to other meat. The data are given
below. What is the test statistic for this hypothesis test?
A. 1.645
B. 3.92
C. 1.96
D. 3.09 120. A marketing research company surveyed grocery shoppers in the east and west coasts to
see the percentage of the customers who prefer chicken to other meat. The data are given
below. Determine the 95% confidence interval for the difference between the proportion of
customers who prefer chicken at the West Coast and the proportion of customers who prefer
chicken at the East Coast.
A. (0.075 0.183)
B. (0.044 0.213)
C. (0.096 0.161)
D. (0.064 0.193) 1850 Chapter 01  An Introduction to Business Statistics 121. Two hospital emergency rooms use different procedures for triage of their patients. We
want to test the claim that the mean waiting time of patients is the same for both hospitals.
The 40 randomly selected subjects...
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 Winter '14

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