Multiple Choice
A random sample of 79 companies from the Forbes 500 list (which actually consists of nearly 800 companies) was selected,and the relationship between sales (in hundreds of thousands of dollars) and profits (in hundreds of thousands of dollars) was investigated by regression.The following results were obtained from statistical software. 
What is an approximate 90% confidence interval for the slope 1?
A) -0.09 ± 0.0075
B) -0.09 ± 0.0125
C) 0.09 ± 0.0075
D) 0.09 ± 0.0125
Correct Answer:
Verified
Correct Answer:
Verified
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