You are asked to determine whether or not brunette students have a higher IQ sco

Question

You are asked to determine whether or not brunette students have a higher IQ score than other students. To do so, you administer an IQ test to a random sample of 300 brunette students. It is known that the national average IQ score of students is 100. Your sample produces an average IQ score of 101, with a standard deviation of 12 points. The levels of significance is a = .05. Match the following. the null hypothesis the alternative hypothesis the standard error the critical test score the test statistic your conclusion A u = 100 B. u notequalto 100 C. u > 100 D. u

Explanation / Answer

null hypothesis: u=100

alternate hypothesis: u>100

std error =12/(300)1/2 =0.69

critcal test score =1.645

test stat =(X-mean)/std error =1.45

conclusion option M is correct

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