Researchers are interested in the effect of a certain nutrie

Researchers are interested in the effect of a certain nutrient on the growth rate of plant seedlings. Using a hydroponics grow procedure that utilized water containing the nutrient, they planted six tomato plants and recorded the heights of each plant 14 days after germination. Those heights, measured in millimeters, were 55.7, 59.5, 60.8, 63.8, 65.6, and 67.4 . Complete parts a through d below. Using technology, find the 95% confidence interval for the population mean mu. Name two things you could do to get a narrower interval than the one in part a. Choose the correct choice below. Decrease the confidence level or decrease the sample size. Decrease the confidence level or increase the sample size. Increase the confidence level or increase the sample size. Increase the confidence level or decrease the sample size. Using technology, construct a 99% confidence interval. Why is the 99% confidence interval wider than the 95% interval? On what assumptions is the interval in part a based?

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