In: Advanced Math
A1-C1
Assignment – Correlation
1. You are given the following statistics: means, standard deviations, and correlations for 4 variables. The four variables are miles per gallon, weight of car, front profile (1-Low, 0-Not Low) and the manufacturer’s suggested retail price. Four hundred cars were sampled. Answer the questions that follow.
MPG |
Weight |
Low Profile Front |
MSRP |
|
Means |
25 |
2500 |
.60 |
24,000 |
St Dev |
5 |
250 |
.40 |
3,000 |
Correlations |
MPG |
Weight |
Low Profile Front |
MSRP |
MPG |
1.00 |
|||
Weight |
-.60 |
1.00 |
||
Low Profile Front |
.25 |
-.30 |
1.00 |
|
MSRP |
.05 |
-.20 |
.30 |
1.00 |
h.__________Higher MPG vehicles have (higher or lower) profiles.
i.__________ How many cars in the sample were low profile.