# Question: a The mean and standard deviation of a sample of

a. The mean and standard deviation of a sample of 100 are x̄ = 10 and s = 1.

Estimate the population mean with 95% confidence.

b. Repeat part (a) with s = 4.

c. Repeat part (a) with s = 10.

d. Discuss the effect on the confidence interval estimate of increasing the standard deviation s.

Estimate the population mean with 95% confidence.

b. Repeat part (a) with s = 4.

c. Repeat part (a) with s = 10.

d. Discuss the effect on the confidence interval estimate of increasing the standard deviation s.

**View Solution:**## Answer to relevant Questions

a. A statistics practitioner calculated the mean and standard deviation from a sample of 51. They are x̄ = 120 and s = 15. Estimate the population mean with 95% confidence.b. Repeat part (a) with a 90% confidence level.c. ...a. A random sample of 25 observations was drawn from a normal population. The sample mean and sample standard deviation are x̄ = 52 and s = 15. Calculate the test statistic of a test to determine if there is enough evidence ...a. A random sample of 11 observations was taken from a normal population. The sample mean and standard deviation are x̄ = 74.5 and s = 9. Can we infer at the 5% significance level that the population mean is greater than ...A company that produces universal remote controls wanted to determine the number of remote control devices American homes contain. The company hired a statistician to survey 240 randomly selected homes and determine the ...In 2010, cost Canadian cities were experiencing a housing boom. As a consequence, home buyers were required to borrow core on their mortgages. To determine the extent of this problem, a survey of Canadian households was ...Post your question