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Mathematics 16 Online
OpenStudy (anonymous):

Draw a stem-and-leaf plot for the data set. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Data set A: The annual wages of employees at a small accounting firm are given in thousands of dollars. 50 36 21 27 32 19 36 35 34 14 31 60 15

jimthompson5910 (jim_thompson5910):

First sort the data from smallest to largest. Tell me what you get.

OpenStudy (anonymous):

I get: 14,15,19,21,27,31,32,34,35,36,36,50,60

jimthompson5910 (jim_thompson5910):

good

jimthompson5910 (jim_thompson5910):

notice how each number is a two digit number the tens digit starts at 1 and goes to 6

OpenStudy (anonymous):

great, thanks. Next?

jimthompson5910 (jim_thompson5910):

so let's set up the stems we have a T table like this with "stem" and "leaf" as headers |dw:1410650401972:dw|

jimthompson5910 (jim_thompson5910):

then in the stem column, we write the numbers 1 through 6 |dw:1410650452924:dw|

OpenStudy (anonymous):

Ok...done

jimthompson5910 (jim_thompson5910):

optionally you can draw these horizontal lines, but you don't have to I'm doing so to help separate things |dw:1410650503385:dw|

jimthompson5910 (jim_thompson5910):

our sorted data set is 14,15,19,21,27,31,32,34,35,36,36,50,60

OpenStudy (anonymous):

OK...thanks

jimthompson5910 (jim_thompson5910):

focus on the numbers that have a tens digit of 1 those numbers are 14, 15, 19 the stem of "1" represents all numbers that have a tens digit of 1 the leaves of 14,15,19 are 4, 5, 9 in that order and they go in the "stem = 1" row |dw:1410650588359:dw|

jimthompson5910 (jim_thompson5910):

then for 21,27, we just add in 1 and 7 to the stem for 2 |dw:1410650622092:dw|

jimthompson5910 (jim_thompson5910):

then we do 31,32,34,35,36,36 so we add on: 124566 |dw:1410650658938:dw|

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