A sample of 29 Menso members have had their Intelligence Quotients (IQs) measure

Question

A sample of 29 Menso members have had their Intelligence Quotients (IQs) measured and recorded. The data were used to calculate a 99% confidence interval for the mean IQ of all Menso members. The confidence interval was calculated as 144 ± 11. According to this confidence interval, it is most reasonable to conclude that:

the mean IQ of all Menso members is between 133 and 155 you are 99% confident the interval between 133 and 155 contains the mean IQ of all Menso members there is a 99% chance that the mean IQ of all Menso members is between 133 and 155 99% of all Menso members have an IQ between 133 and 155

Explanation / Answer

You are 99% confident the interval between 133 and 155 contains the mean IQ of all Menso members

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