Construct and interpret a 90% confidence interval
In a random sample of 35 cras owners, an average amount spent on gasoline per week was $15 with a standard deviation of $18.construct and interpret a 90% confidence interval to estimate the mean weekly gasoline expenditure.
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Construct a 99% confidence interval estimate of the population mean amount of olive oil included in a 1-gallon tin. Construct a 95% confidence interval estimate. How does this change your answer to (b)?
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In a random sample of 35 cras owners, an average amount spent on gasoline per week was $15 with a standard deviation of $18. construct and interpret a 90% confidence interval to estimate the mean weekly gasoline expenditure.
Johnson Inc borrowed $500,000 at a rate of 10%, simple interest, with monthly interest payments. Based on a 365-day year, what would Johnson's required interest payment be for a 30-day month?
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A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. Briefly explain how the difference simply may be sampling error.
A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and = 0.01. What are the critical values?
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