Multiple Choice
Exhibit 8-2
A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is known that the standard deviation of the population is 22 mph.
-Refer to Exhibit 8-2. The 96.6% confidence interval for μ is
A) 63.00 to 67.00
B) 60.76 to 69.24
C) 61.08 to 68.92
D) 60.00 to 80.00
Correct Answer:
Verified
Correct Answer:
Verified
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