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1. A random sample of 15 items is taken, producing a sample mean of 2.364 with a sample variance of .81. Assumexis normally distributed and

1. A random sample of 15 items is taken, producing a sample mean of 2.364 with a sample variance of .81. Assumexis normally distributed and construct a 90% confidence interval for the population mean.

(Round the answers to 3 decimal places.)

2. If a random sample of41items produces=134.4ands=18.6, what is the 98% confidence interval for? Assumexis normally distributed for the population. What is the point estimate? (Round your answer to 1 decimal place.) The point estimate is .

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