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Find a 90% confidence interval for the population mean

Latasha is a waitress at Seventh Heaven Hamburgers. She wants to estimate the average quantity each group at a table leaves for a tip. A random sample of 52 groups gave a mean of $8.30 with a standard deviation of $2.42. Find out a 90 percent confidence interval for the mean amount left by all groups.

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  • Reference No.:- M922126

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