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An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 3 IQ points of the true mean. Assume that a = 12 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. E) The required sample size is D. (Round up to the nearest integer.) Would it be reasonable to sample this number of students? No. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly large number. No. This number of IQ test scores is a fairly large number. Suppose 238 subjects are treated with a drug that is used to treat pain and 52 of them developed nausea. Use a 0.01 signicance level to test the claim that more than 20% of users develop nausea. (I) Identify the null and alternative hypotheses for this test. Choose the correct answer below. {:1- A. H0: p = 0.20 H1: p 0.20 H1: p = 0.20 C. H0: p = 0.20 H1: p > 0.20 1"} D. H0: p = 0.20 H1: p i 0.20 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is D. (Round to two decimal places as needed.) Identify the Pvalue for this hypothesis test. The P-value forthis hypothesis test is D. (Round to three decimal places as needed.) Suppose that in a certain hypothesis test the null hypothesis is rejected at the 0.10 level; it is also rejected at the 0.05 level; however it cannot be rejected at the 0.01 level. Then for this test we can say that . . . O A. P-value = 0.01 O B. 0.01 0.10Linear Correlation. What is the requirement to test if there is a linear correlation for a population? (E A. none of the other answers {1:} B. The scatterplot must show an approximately straight line and data should contain no outliers C. there must be more than 5 observations D. r should be greater than 0 Suppose we compute the value of r = 0.732, and the critical values of r= t 0.441, then i") A. none of the other answers 6'} B. there is not sufficient evidence to support the claim of a linear correlation. i") C. there is sufficient evidence to support the claim of a linear correlation

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