exam 2 review - STA 2023 Practice Questions Chapter 7...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
STA 2023 Practice Questions Chapter 7 - Chapter 8 Sec. 2 Memorize these Formulas: General Format for Confidence Interval – estimator +/- (t or z) est. standard error General Format of Test Statistic -- # ( ) o estimator from H t or z estimate of stderr - = Make sure you know how to get the sample size for a one sample proportion and a one sample mean problem. Practice Problems on next page.
Image of page 1

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

View Full Document Right Arrow Icon
1. You take a random sample from some population and form a 96% confidence interval for the population mean, μ. Which quantity is guaranteed to be in the interval you form? a) 0 b) μ c) x d) .96 2. Suppose you conduct hypothesis test for the population proportion and your p-value is .184. Given a 0.10 level of significance, which of the following should be your conclusion? 3. Decreasing the sample size, while holding the confidence level the same, will do what to the length of your confidence interval? 4. Decreasing the confidence level, while holding the sample size the same, will do what to the length of your confidence interval? 5. If you increase the sample size and confidence level at the same time, what will happen to the length of your confidence interval? a) make it bigger b) make it smaller c) it will stay the same d) cannot be determined from the given information 6. Which of the following is a property of the Sampling Distribution of x ?
Image of page 2
7. Which of the following is true about p-values? 8. Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 95% confidence. The margin of error we are willing to accept is 0.5. Suppose we also know that s is about 10. What sample size should we use?
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
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