(3 pts)
(HINTS: Do not use commas nor dollar signs in your answers
below. Also, why should a normal model be used instead of a t
model?)
below. Also, why should a normal model be used instead of a t
model?)
Starting salaries of 95 college graduates who have taken a
statistics course have a mean of $43,469. Suppose the distribution
of this population is approximately normal and has a standard
deviation of $10,385.
statistics course have a mean of $43,469. Suppose the distribution
of this population is approximately normal and has a standard
deviation of $10,385.
Using an 85% confidence level, find both of the
following:
following:
(a) The margin of error =
(b) The confidence interval for the mean μ = <μ<
