# Question

A sample of certain observations selected from a normally distributed population produced a sample variance of 46. Construct a 95% confidence interval for σ2 for each of the following cases and comment on what happens to the confidence interval of σ2 when the sample size increases.

a. n = 12

b. n = 16

c. n = 25

a. n = 12

b. n = 16

c. n = 25

## Answer to relevant Questions

A sample of 25 observations selected from a normally distributed population produced a sample variance of 35. Construct a confidence interval for σ2 for each of the following confidence levels and comment on what happens to ...Sandpaper is rated by the coarseness of the grit on the paper. Sandpaper that is more coarse will remove material faster. Jobs such as the final sanding of bare wood prior to painting or sanding in between coats of paint ...The percentage distribution of birth weights for all children in cases of multiple births (twins, triplets, etc.) in North Carolina during 2009 was as given in the following table: The frequency distribution of birth weights ...Find the value of x2 for 4 degrees of freedom and a. .005 area in the right tail of the chi-square distribution curve b. .05 area in the left tail of the chi-square distribution curve Usually people do not like waiting in line for a long time for service. A bank manager does not want the variance of the waiting times for her customers to be greater than 4.0 square minutes. A random sample of 25 customers ...Post your question

0