The accompanying table shows a random sample of eight laptops and the battery life, y, and corresponding screen size, x, of each. The regression line for the data is y=5.8201−0.1402x, and SSE=0.969. Use this information to complete parts a through c below.
battery life screen size
3.8 15.7
3.4 17.4
4.1 14.4
3.8 11.6
3.3 13.7
3.8 13.4
4.8 11.2
4.2 12.2
Homework Answers
# Answers:
a] answer is B
test statistics is t = -1.95 (negative sign)
p-value = 0.099
since p-value > 0.05, we fail to reject H0 & conclude that the slope is not significant
conclusion: No, because the p-value is greater than alpha
b] UCL = 0.04
LCL = -0.32 (negative sign)
c] fill in the blanks are i] 0.32 ii] 0.04
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