The time (in number of days) until maturity of a certain variety of tomato plant is Normally distributed with mean ?. You select a simple random sample of four plants of this variety and measure the time until maturity. The four times, in days, are as follows: 63 69 62 66 with standard deviation 3.16. calculate the 99% confidence interval for population mean ?. Find the closest answer (57.99, 72.01) (63.8,66.2) (61.91, 68.09) (55.76, 74.24)
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We have a sample of size n=4, so we need to use a t-distribution with n-1=3 degrees of freedom to calculate the confidence interval. Show more…
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