A) 82 B) 128 5) In order to set rates, an insurance company is trying to estimate the number of sick davs that full time workers at an auto repair shop take per year. A previous study indicated that the standard deviation was 3.1 days. How large a sample must be selected if the company wants to be 97% confident that the true mean differs from the samplee mean by no more than 1 day? A) 512 B) 1024 C) 141 D) 46 Find the sample proportion, p-hat. 6) When 410 college students were surveyed,150 said they own their car. Find a point estimate for p (p-hat), the population proportion of students who own their cars. A) 0.634 B) 0.268 C) 0.366 D) 0.577 Construct the Confidence Interval for the proportion. 7) In a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for the proportion of left-handed golfers from this sample. A) (0.1250, 0.1565) B) (0.1375, 0.1625) C) (0.1125, 0.1900) D) (0.1870, 0.2150) 8) A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the proportion of homeless persons who are veterans. A) (0.167, 0.283) B) (0.184, 0.266) C) (0.161, 0.289) D) (0.176, 0.274) nimum Sample size for proportion (Special formula) 9) A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How large sample is needed in order to be 98% confident that the sample proportion will not differ from the true proport by more than 3%? A) 1068 D) 3017 60 09

Question

5,6,7

A) 82
B) 128
5) In order to set rates, an insurance company is trying to estimate the number of sick davs that full time workers at an
auto repair shop take per year. A previous study indicated that the standard deviation was 3.1 days. How large a
sample must be selected if the company wants to be 97% confident that the true mean differs from the samplee mean
by no more than 1 day?
A) 512
B) 1024
C) 141
D) 46
Find the sample proportion, p-hat.
6) When 410 college students were surveyed,150 said they own their car. Find a point estimate for p (p-hat), the
population proportion of students who own their cars.
A) 0.634
B) 0.268
C) 0.366
D) 0.577
Construct the Confidence Interval for the proportion.
7) In a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for the proportion
of left-handed golfers from this sample.
A) (0.1250, 0.1565)
B) (0.1375, 0.1625)
C) (0.1125, 0.1900)
D) (0.1870, 0.2150)
8) A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the
proportion of homeless persons who are veterans.
A) (0.167, 0.283)
B) (0.184, 0.266)
C) (0.161, 0.289)
D) (0.176, 0.274)
nimum Sample size for proportion (Special formula)
9) A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How large
sample is needed in order to be 98% confident that the sample proportion will not differ from the true proport
by more than 3%?
A) 1068
D) 3017
60 09
Expand
Transcribed Image Text

A) 82 B) 128 5) In order to set rates, an insurance company is trying to estimate the number of sick davs that full time workers at an auto repair shop take per year. A previous study indicated that the standard deviation was 3.1 days. How large a sample must be selected if the company wants to be 97% confident that the true mean differs from the samplee mean by no more than 1 day? A) 512 B) 1024 C) 141 D) 46 Find the sample proportion, p-hat. 6) When 410 college students were surveyed,150 said they own their car. Find a point estimate for p (p-hat), the population proportion of students who own their cars. A) 0.634 B) 0.268 C) 0.366 D) 0.577 Construct the Confidence Interval for the proportion. 7) In a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for the proportion of left-handed golfers from this sample. A) (0.1250, 0.1565) B) (0.1375, 0.1625) C) (0.1125, 0.1900) D) (0.1870, 0.2150) 8) A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the proportion of homeless persons who are veterans. A) (0.167, 0.283) B) (0.184, 0.266) C) (0.161, 0.289) D) (0.176, 0.274) nimum Sample size for proportion (Special formula) 9) A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How large sample is needed in order to be 98% confident that the sample proportion will not differ from the true proport by more than 3%? A) 1068 D) 3017 60 09

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