A random sample of 40 adults aged 25 to 34 years spent an average of $216...
A random sample of 40 adults aged 25 to 34 years spent an average of $216 annually on movies The sample standard deviation is $60.
a) Develop a 95% confidence interval for the average annual amount spent on movies.
b) Verbally interpret the meaning of the confidence interval that you found for part a
c) If the desired margin of error for the above confidence interval is $10, what size sample is necessary? using the sample standard deviation given above as the planning value for the population standard deviation
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A random sample of 40 adults aged 25 to 34 years spent an
average of $216...
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A random sample of 40 adults with no children under the age of 18 years results in a meandaly leisure time of 5.92 hours, with a standard deviation of 2.33 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.26 hours, with a standard deviation of 1.61 hours. Construct and interpret a 95% confidence interval for the mean difference in leisure time between adults with no children...
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