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Bon Air Elementary School has a total of 1000 students. It has been previously established by...

Bon Air Elementary School has a total of 1000 students. It has been previously established by the principal of the school that the average IQ of students at Bon Air is 110. In recent years, she has been noticing a lack of effort and increase number of absences from students. She decides to administer an IQ test to 20 randomly selected students. Among the sampled students, the average IQ is 108 with a standard deviation of 10. Based on these results, is there statistically significant evidence to say that the mean IQ score is less than 110 points?

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than 110 points. Given, n=20, x= 108 , s=10 Claim mean to score is less . Hypotheses are, Hos M = 110 Hit all < 110 Test stat

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