Multiple Choice
For a sample 1000 Twitter users, Tele-Market Research reports an average age of 39.If the population standard deviation is 9.5 years, what would be the upper bound for an 80% confidence interval estimate of the mean age of all Twitter users?
A) 42.37
B) 39.38
C) 41.30
D) 39.62
E) 43.13
Correct Answer:
Verified
Correct Answer:
Verified
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