Posted: December 18th, 2016

Is a child’s intelligence negatively affected if the mother has German measles during pregnancy?

IQ scores from the general population form a normal distribution with am = 100 ands = 15. However, data indicate that children’s intelligence may be negatively affected if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 children whose mothers all had German measles during their pregnancies. The average IQ for this sample wasx?= 96.4. Do these data indicate that German measles have a significant negative effect on IQ? Test withalpha=.05. Note µ = population mean x? = sample mean s = standard deviation ——————————————————————————————————————— Note: Each response is worth 6 points Step 1: Set up your hypothesis and determine the level of significance State the null hypothesis 1. In written format Answer: 2. In mathematical format Answer: H0 State the alternative hypothesis 1. In written format Answer: 2. In mathematical format Answer: H1 -Continued below- Determine the Level of Significance 3. Based on information in the scenario, what is the level of significance to be used? Answer: Step 2: Select the appropriate test statistic 4. The appropriate test statistic for the above scenario is the one-sample z-test. What values are compared in a one-sample z-test? Answer: Step 3: Set up the decision rule 5. Based on thelevel of significance you set in step 1 and whether your alternative hypothesis is directional or non-directional, what is your decision rule(in relation to the z-statistic)? Answer Step 4: Compute the test statistic 6. Calculate the z-statistic (must show your work). Answer: Step 5: Conclusion 7. Do you reject or fail to reject the null hypothesis? Answer: 8. Is a child’s intelligence negatively affected if the mother has German measles during pregnancy? Answer:

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