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Suppose it is known that the IQ scores of a certain population of adults are approxi-...

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Basic Math

Suppose it is known that the IQ scores of a certain populationof adults are approxi- mately normally distributed with a standarddeviation of 15. A simple random sample of 25 adults drawn fromthis population had a mean IQ score of 105.

a) Is there evidence at 5% significance level that the averageIQ in this population is not equal to 100?

Please also explain how you got the critical value.

Thanks!!!

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