Population average rating of the new hmo

Reference no: EM13536316

Last year Sally belonged to an HMO that had a population average rating of 62 this was based on records accumulated about the HMO over a long period of time. This year Sally switched to a new HMO. To assess the population mean rating of the new HMO, a sample of 20 members of this HMO are polled and they give it an average rating of 65 with a standard deviation of 10. Find a 95% confidence interval for population average rating of the new HMO

Reference no: EM13536316

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