The
data below lists the ages of applicants who were successful in
winning promotion. Assume that rhe same is a simple random sample.
33,36,37,38,38,39,42,42,43,43,44,44,44,45,45,45,45,46,46,47,47,48,48,49,49,51,51,52,54
a. Construct a 95% confidence interval estimare of the mean
age of all such successful people. (Think: Do you use a z or t
distribution?)
b. Change the last age mean from 54 years to 540 years. This
value is not realistic, but such an error can easily occur during a
data entry process. Compute a 95% confidence interval including
this change. Does the confidence interval change much?
please make the answer legible. TIA!! :)