Exercises_on_Confidence_Intervals_-_Moodle

Exercises_on_Confidence_Intervals_-_Moodle - b Construct...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
March 8, 2010 Exercises on Confidence intervals #1. What is the best estimate of a population mean and why? #2. What is a 95% confidence interval? #3. A researcher predicts that showing a certain film will change people's attitudes towards alcohol. The researchers then randomly select 36 people, show them the film, and give them an attitude questionnaire. The mean score on the attitude test for these 36 people is 70. The score for people in general on this test is 75, with a standard deviation of 12. a) Find the best point estimate of the mean of people who see the film.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: b) Construct the 95% confidence interval. c) What can you conclude? #4. On a perceptual task, participants must sort cards with certain shapes into separate piles. The data reveal a normal distribution with an average completion time of M = 92 seconds a SD = 11. A sample of 5 participants with frontal lobe damage is tested on the task. For these participants, the sample mean is 100 seconds. a) Construct the 95% confidence interval. b) Construct the 99% confidence interval....
View Full 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