grocery prices seem to keep going up. a market researcher was asked to interview 65 shoppers...

grocery prices seem to keep going up. a market researcher was asked to interview 65 shoppers and ask how much each spent per week to feed their family. the average amount was 166.50 with a std. deviation of $49.10. construct the 90%, 95% and 99% confidence interval for the true mean amount spent on weekly groceries.

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orchestra answered 1 year ago

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