Roger spent 45 minutes studying for the test. Assuming the trend that exists in the data set below applies to Roger as well, app
roximately which grade should Roger expect to receive on the test? Time Spent Studying (minutes) Grade on Test (%) 0 28 0 54 30 45 30 39 30 63 60 53 60 75 90 85 90 78 120 92 120 100 120 98 120 89 180 99 180 95
2 answers:
He would more than likely receive a 60%
Answer:
60%
Step-by-step explanation:
0 28
0 54
30 45
30 39
30 63
60 53
60 75
90 85
90 78
120 92
120 100
120 98
120 89
180 99
180 95
Using linear regression calculator
Equation : ŷ = 0.36805X + 42.6864
Now we are supposed to find which grade should Roger expect to receive on the test if he studies for 45 minutes.
Substitute x = 45
ŷ = 0.36805(45) + 42.6864
ŷ = 59.24865
So, Roger should expect 60% grade.
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