Answer to Question #137448 in Statistics and Probability for soong

Question

Q4 Computer Action Company sells computers and computer parts by mail. The company assures its customers that products are mailed as soon as possible after an order is placed with the company. A sample of 50 recent orders showed that the mean time taken to mail products for these orders was 70 hours and the standard deviation was 16 hours. Construct 90% confidence interval for the mean time taken to mail products for all orders received at the office of this company.
Q5 A random sample of prices (in RM) for the 1GB thumbdrives sold in a mall is as follows.
15 30 45 18 21 29 25 43 33 27 35 20
Contruct a 99% confidence interval for the true population mean.
Q6 Fourteen eggs were randomly selected from a farm and the mass (in gram) is recorded as below.
X2 = 19779 X = 487
Construct a 95% confidence interval for the mean mass of eggs.

Answer 1

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