Multiple Choice
150 sixth-form students are sampled (a simple random sample) from 3000 in sixth-form colleges across the West Midlands.From the sampled students,an average IQ of 115 is determined,with a standard deviation of 10.What is the 99% confidence interval?
A) 115 ± 0.01
B) 115 ± 1.22
C) 115 ± 2.10
D) 115 ± 3.22
Correct Answer:
Verified
Correct Answer:
Verified
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