1 / 7

Stats Practice

Stats Practice. Measures of Central Tendency. On a quiz given to 5 students, the scores were as follows:  17, 19, 20, 22, 22 What is the mean? What is the median? What is the mode?. Skewed Distributions.

colleen-bell
Download Presentation

Stats Practice

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Stats Practice

  2. Measures of Central Tendency • On a quiz given to 5 students, the scores were as follows:  17, 19, 20, 22, 22 • What is the mean? • What is the median? • What is the mode?

  3. Skewed Distributions • Out of 108 students in Mrs. O'Connor's AP Psychology classes, 107 people earned an A on the Chapter 2 Exam.  One person earned an F.   • What happened to the mean as a result of the one F?  • What type of distribution is this?

  4. Standard Deviation • Two tests were given.  The standard deviation of the first test was 10.  The standard deviation of the second test was 15.  • Which test had scores that were more spread out?

  5. Z-scores • Ryan earned a 70 on a normally distributed test with a mean of 60.  The standard deviation was 5.  What is Ryan's z-score? • Alyssa earned a 65 on a normally distributed test with a mean of 80.  The standard deviation was 15.  What is Alyssa's z-score? 

  6. Percentile Rank • For a language test with normally distributed scores, the mean was 75 and the standard deviation was 15. Approximately what percentage of test-takers scored a 60 or above? • For a language test with normally distributed scores, the mean was 40 and the standard deviation was 10. Approximately what percentage of test-takers scored a 50 or above?

  7. Percentile Rank • Dr. Zimbardo conducted an intelligence test in which the scores were normally distributed. The mean was 85 and the standard deviation was 10. What percentage of people scored a 95 or above? Show your work/distribution. • In the above question, what was the variance? • Dr. Milgram conducted a strength test in which the scores were evenly distributed. The mean was 115 and the standard deviation was 5. What percentage of people scored 105 or above? Show your work/distribution. • In the above question, what was the variance?

More Related