The time (in number of days) until maturity of a certain variety of tomato plant is Normally distributed with an unknown mean and standard deviation = 2.4. I select a simple random sample of four plants of this variety and measure the time until maturity. The sample yields * = 65. A 95% confidence interval for u, in days, is: 65.00± 1.97. 65.00 +2.35. 65.00 ± 3.95. 65.00 +4.70.

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