Share
Explore BrainMass

# Statistics: Correlation Coefficient, Probability and Measurement

See the attached file.

Q1)
The diastolic blood pressure, x, and the systolic blood pressure, y, were recorded for 13 females.
x 76 70 82 90 68 60 62 60 62 72 68 80 74
y 122 102 118 126 108 130 104 118 130 116 102 122 120
Find the correlation coefficient (and all related values) for these data:

Q2)
Suppose a certain ophthalmic trait is associated with eye color. One hundred and fifty randomly selected individuals are studied with results as follows:
Trait Blue Brown Other Total
Yes 35 15 10 60
No 10 55 25 90
Total 45 70 35 150

What is the probability that a person selected at random has blue eyes?
What is the probability that a person selected at random has the trait?
Are events A(has blue eyes) and B(has the trait) independent?

Q3)
The commuting distance was determined for each of 9 employees at a manufacturing plant. One of the employees lives in another town and has a large commuting distance. The 9 distances were as follows: 5, 10, 7, 15, 10, 12, 8, 120, 18.
Fined the mean:
Find the median distance:
Which measurement is most representative for the data?

#### Solution Summary

The solution determines the correlation coefficient, probability and measurement of various statistics questions.

\$2.19