Measures of Central Tendency, Dispersion, IQR and standard deviation - PowerPoint PPT Presentation

About This Presentation
Title:

Measures of Central Tendency, Dispersion, IQR and standard deviation

Description:

Unit 4 Measures of Central Tendency, Dispersion, IQR and standard deviation Day 93 * How do we describe data using statistical measures? – PowerPoint PPT presentation

Number of Views:255
Avg rating:3.0/5.0
Slides: 10
Provided by: Effin59
Category:

less

Transcript and Presenter's Notes

Title: Measures of Central Tendency, Dispersion, IQR and standard deviation


1
Measures of Central Tendency, Dispersion, IQR and
standard deviation
Unit 4
Day 93 Wednesday, March 10, 2021
  • How do we describe data using statistical
    measures?

2
Example 1
  • Directions Find the Mean, Median, Mode, Range,
    IQR and Standard Deviation for the following data
    set.
  • 4, 2, 10, 6, 10, 7, 10
  • mean 7
  • median 7
  • mode 10
  • Range 8
  • IQR 6
  • SD 2.98

3
Example 2
  • Directions Find the Mean, Median, Mode, Range,
    IQR and Standard Deviation for the following data
    set.
  • mean 52.42
  • median 53
  • mode No Mode
  • Range 39
  • IQR 24
  • SD 12.62

4
Ex 3 If the average monthly temperature
increased by 2 degrees each month, how would this
affect the mean and standard deviation?
  • The mean would increase by 2 and the standard
    deviation would remain the same.

5
Ex 4 If the average monthly temperature
increased by 3 degrees in the Month of March and
July, how would this change the mean?
The mean and the standard deviation would
increase.
6
Example 5
  • Directions
  • Find the mean number of shutouts.
  • Find the interquartile range.

mean 72.8 IQR 19
7
Example 6
  • Directions The following is a list of lengths
    (in minutes) of 13 Movies. Find the Mean and
    Standard Deviation for the following data set.
  • 90, 102, 120, 180, 90, 85, 90, 137, 120, 151, 97,
    93, 120

mean 113.46
SD 27.46
8
Ex 7 The following is a list of lengths (in
minutes) of 13 Movies.
  • 90, 102, 120, 180, 90, 85, 90, 137, 120, 151, 97,
    93, 120
  • If all movie times increased by 10 minutes, how
    would the mean and standard deviation be
    affected?
  • The mean would increase by 10 and the standard
    deviation would remain the same.
  • If all movie times decreased by 5 minutes, how
    would the mean and standard deviation be
    affected?
  • The mean would decrease by 5 and the standard
    deviation would remain the same.

9
  • Assignment Unit 4 Day 93 Handout
Write a Comment
User Comments (0)
About PowerShow.com