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The average IQ of the adult population is 100. A researcher believes the average IQ of adults is lower. A random sample of five adults
The average IQ of the adult population is 100. A researcher believes the average IQ of adults is lower. A random sample of five adults are tested and scored as shown below:
69, 79, 89, 99, 109
Is there enough evidence to suggest the average adult IQ is Lower?( = 0.05)
Please answer using t-test
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