2023-exam3-s121 (1)

# 2023-exam3-s121 (1) - STATISTICS 2023 PRINT NAME CLEARLY IN...

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STATISTICS 2023 PRINT NAME CLEARLY IN INK___________________________ EXAM THREE SIGNATURE IN INK_____________________________________ SPRING 2012 CWID IN INK___________________________________________ RETAIN THIS EXAM FOR GRADE VERIFICATION ONCE RETURNED TO YOU. TRUE OR FALSE. Answer with a capital T or F. (3 points each) ________ 1. The p-value of a hypothesis test is the probability that the null hypothesis should not be rejected. ________ 2. The standard errors of point estimators increase in magnitude when the sample size decreases. ________ 3. A sample statistic is used as a point estimate to estimate a population parameter. ________ 4. The center value of a confidence interval is the bound of error for the confidence interval that is used to estimate the parameter of interest. ________ 5. In a hypothesis test the researcher makes a claim about the value of a population parameter, and then the sample data are used to decide whether the claim should be rejected. ________ 6. A confidence interval provides a set of reasonable and plausible values for the parameter being estimated and those values would not be rejected if tested in a two-tail hypothesis test with the same significance level. ________ 7. When the null hypothesis is not rejected then it is concluded that the data in the sample provide evidence in support of the claim stated in the null hypothesis. t-table Questions. Write your answer on the line. 3 points each) ______________ 8. What is the P(t > 2.048) if df = 28? ______________ 9. State the value of t o , if the P(t > t o ) = .975 and the df = 10. _____________ 10. What is the P( - 2.262 < t < 2.262) if df = 9?

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STATISTICS 2023 EXAM THREE SPRING 2012 PAGE 2 STATE THE ANSWER. State the answer on the line given. (3 points each) _______________ 11. If a 99% confidence interval to estimate a population mean is (202.3, 303.9) what is the value of the point estimate for the population mean? _______________ 12. If a 95% confidence interval based on a large sample to estimate a population mean is (146.08, 153.92) then what is the value of the standard error of the point estimate for the population mean?
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• Spring '16
• Christy Turner
• Statistics, Statistical hypothesis testing

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