5 Answered Questions for the topic Sample Mean

06/06/21

How do you calculate the confidence intervals for a population mean with only the sample mean and sample standard deviation?
I have a random sample and need to calculate the 95% confidence interval for the population mean(sample mean = 1076sample standard deviation = 80.61sample size is n=5)
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Sample Mean Statistics Margin Error

04/25/21

Computing the sample mean and maximal margin of error E.
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $2.82 to $3.75. Use the fact that the confidence interval for the... more
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02/01/21

Problem Solving
The formula for the standard error (standard deviation of the distribution of sample means) implies that as the sample size (n) increases, the size of the standard error decreases. Explain the role... more
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06/12/20

Probability in statistics and standard deviation

The number of hours an American adult sleeps each night follows a Normal distribution with an average of 6.9 hours per night with a standard deviation of 0.68 hours. If we take a random sample of... more
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Sample Mean

06/07/15

Identify which value represents the sample mean and which value represents the claimed population mean
A recent article in a college newspaper stated that college students get an average of 5.5 hrs of sleep each night. A student who was skeptical about this value decided to conduct a survey by... more
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