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PLEASE ANSWER THE QUESTION IN 15 MINUTES
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PLEASE ANSWER THE QUESTION IN 15 MINUTES
PLEASE ANSWER THE QUESTION IN 15 MINUTES
8. You measure the lifetime of a random sample of 64 tires of a certain brand. The sample mean is x = 50 months. Suppose that the lifetimes for tires of this brand follow a normal distribution, with unknown mean and standard deviation o= 5 kg. 8. Find the critical value for 97% confidence level (a) 1.645 (b) 1.96 (c) 2.17 (d) 2.576
8. You measure the lifetime of a random sample of 64 tires of a certain brand. The sample mean is x = 50 months. Suppose that the lifetimes for tires of this brand follow a normal distribution, with unknown mean and standard deviation o= 5 kg. 8. Find the critical value for 97% confidence level (a) 1.645 (b) 1.96 (c) 2.17 (d) 2.576