1Given the following data set:

X 72 98 76 81 42 87 72 96

Y 78 94 89 85 76 75 78 97

Already calculated for you are: x=78andy=84andSx=17.67andSy=8.55

a. Calculate (xix)(yiy). Answer is .

b. Find the correlation coefficient r. Round to 2 decimals. Answer is .

2The scores of adults on an IQ test are approximately Normal with mean 100 and standard deviation 15. Find the top 10% of the scores.

a. Find the z-value for the top 10%. Write your answer in 2 decimals (Read Table Z).

Answer:

b. Find the IQ scores of the top 10%. Write your answer in whole number.

Answer: IQ scores above

3Given the 5-Number Summary: 12, 21, 24, 25, 34

Construct the interval to determine the outliers.

Write (Lower Bound, Upper Bound) of the interval.

Answer is ( , )