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

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
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?
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
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?
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern