It is commonly believed that age is related to Internet usage among college stud
ID: 3152681 • Letter: I
Question
It is commonly believed that age is related to Internet usage among college students. Here are data from a sample of six college students:
Age (x)
Internet usage hours/week (y)
18
20
18
19
19
17
20
16
20
15
21
8
The goal is to perform the bivariate regression of age on Internet usage hours per week. Ultimately you’ll have to compute the values for a and b in this equation: y = a+bx + . If a=78.23, b=-3.23, and the standard error for b is 0.70, what is the t-score for the null hypothesis that b=0? Report the absolute value for the t-score.
Age (x)
Internet usage hours/week (y)
18
20
18
19
19
17
20
16
20
15
21
8
Explanation / Answer
From excel
t cal =4.6
hence t is between 4.5 and 5.5
Coefficients Standard Error t Stat P-value Intercept 78.22727273 13.59368321 5.754678 0.004522 Age (x) -3.227272727 0.701974782 -4.59742 0.01005Related Questions
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