5. Attending sporting events is a popular source of entertainment. When 1000 people were surveyed, 590 said that getting together with friends was an important reason for attending a sporting event. a. Let p be the proportion of all people attending a sporting event to be with friends. Find a point estimate for p. b. Find a 99% confidence interval for p.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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5. Attending sporting events is a popular source of entertainment. When 1000 people
were surveyed, 590 said that getting together with friends was an important reason for
attending a sporting event.
a. Let p be the proportion of all people attending a sporting event to be with friends.
Find a point estimate for p.
b. Find a 99% confidence interval for p.
6. You are doing a research project in political science to determine the proportion of
voters in your district who favor capital punishment.
a. If no preliminary sample of voters is taken to estimate p, how large a sample is
necessary to be 99% sure that the point estimate will be within a distance of .01 from p?
b. The NORC found that approximately 67% of people in the U.S. favor capital
punishment. How large a sample is necessary to be 99% sure that the point estimate will
be within a distance of .01 from p?
7. A study was conducted on parental empathy for sensitivity cues and baby
temperament in infants. In a sample of 32 mothers, the mean was 69.44 with a standard
deviation of 11.69. In a sample of 32 fathers, the mean was 59.0 with.a standard deviation
of 11.60. Find a 99% confidence interval for u1-u2.
6
Transcribed Image Text:5. Attending sporting events is a popular source of entertainment. When 1000 people were surveyed, 590 said that getting together with friends was an important reason for attending a sporting event. a. Let p be the proportion of all people attending a sporting event to be with friends. Find a point estimate for p. b. Find a 99% confidence interval for p. 6. You are doing a research project in political science to determine the proportion of voters in your district who favor capital punishment. a. If no preliminary sample of voters is taken to estimate p, how large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p? b. The NORC found that approximately 67% of people in the U.S. favor capital punishment. How large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p? 7. A study was conducted on parental empathy for sensitivity cues and baby temperament in infants. In a sample of 32 mothers, the mean was 69.44 with a standard deviation of 11.69. In a sample of 32 fathers, the mean was 59.0 with.a standard deviation of 11.60. Find a 99% confidence interval for u1-u2. 6
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