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 0 answersPost by Jenny Song on October 29, 2015Why age of all eight employees is population? 1 answerLast reply by: MOGIN DaniloffSun Apr 20, 2014 9:39 PMPost by wendy Britton on June 10, 2012Find the z-scores given the following information:a. Z.05 the Z is in upper case and the .05 is in lower case

### Summarizing Distributions, Measuring Center

• The mean is the average of the data set. It is influenced by outliers.

• When computing the median, make sure the data is ordered from lowest to highest.

• The mode is the most frequently occurring value in the data set. This is best used with qualitative variables.

• The mean is the best measure of center since it uses all of the observations; however, if the data are skewed, the median is the preferred measure of center.

### Summarizing Distributions, Measuring Center

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Measures of Central Tendency 0:08
• Mean (average) 0:28
• Mean for Population Data
• Mean for Sample Data
• Example: Mean 1:57
• Example: Mean 2:49
• Median 3:53
• Example: Median 4:52
• Example: Median 6:47
• Mode 8:01
• Unimodal
• Bimodal
• Multimodal
• Example: Mode 8:34
• Example: Mode 9:53
• Effect of Changing Units 10:31
• Extra Example 1
• Extra Example 2