Ten randomly selected people took an IQ test A, and next day they took a very si

Question

Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Consider (Test A mid dot Test B). Use a 0.05 significance level to test the claim that people do better on the second test than they do on the first. What test method should be used? Matched Pairs Two Sample t Two Sample z The test statistic is_________________The critical value is_________________Is there sufficient evidence to support the claim that people do better on the second test? Yes No Construct a 95% confidence interval for the mean of the differences. Again, use (Test A - Test B).

Explanation / Answer

Ho: There is no significant difference between the two tests A and B i.e mean of A = mean of B

against,

H1: There is a significant difference between the two tests A and B i.e mean of A < mean of B

the people can do better in the second test.

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