Listed below are the amounts of net worth(in millions ofdollars) of the ten wealthiest celebrities in a country. 90% confidence interval.

255

200

186

170

167

157

157

157

157

157

Part 1

What is the confidence interval estimate of the population mean

?

$[ ]million<<$[ ]million

(Round to one decimal place asneeded.)

Part 2

What does the result tell us about the population of allcelebrities?

A.

Because the ten wealthiest celebrities are not a representativesample, thisdoesn't provide any information about the population of all celebrities.

B.

We are

90%

confident that the interval from

$

million to

$

million actually contains the true mean net worth of all celebrities.

C.

We are confident that

90%

of all celebrities have a net worth between

$

million and

$

million.

Part 3

Do the data appear to be from a normally distributed population asrequired?

A.

No, but the points in the normal quantile plot lie reasonably close to a straight line and show some systematic pattern that is a straight line pattern.

B.

Yes, but the points in the normal quantile plot do not lie reasonably close to a straight line or show a systematic pattern that is a straight line pattern.

C.

No, because the points lie reasonable close to a straightline, but there is a systematic pattern that is not a straight line pattern.

D.

Yes, because the pattern of the points in the normal quantile plot is reasonably close to a straight line.