WEEK_6_Discussion_Solution,_Section_B

WEEK_6_Discussion_Solution,_Section_B - WEEK #6 DISCUSSION...

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WEEK #6 DISCUSSION SOLUTION, SECTION B B. THREADED DISCUSSION PROBLEMS – Mean, Mode, Median & Standard Deviation WEEK # 6 1) Use the sample shown below to calculate the mean and standard deviation using the instructions in Lecture 6 for either the TI - 83 or the TI BA II Plus . Please note the UNDERLINED statement below. Also, calculate the median and mode , manually, for the following sample. This sample totals "66" which is an EVEN number. SEE LECTURE6; DON’T USE THE FORMULA METHOD SHOWN TO CALULATE STANDARD DEVIATION. USE INSTRUCTIONS SHOWN USING EITHER THE TI-83 PLUS OR THE TI BA II PLUS. Observation…Frequency 40…………………. .15 50…………………. .18 60…………………. .14 70…………………. .19 Total………………. .66 ( EVEN NUMBER ) Solution: The total of the frequencies is 66. Divide that number by 2 to get 33. The 33 rd number in sequence is 50. The first 15 numbers are 40’s followed by the next 18 numbers being 50’s. This represents the first 33 #’s. The 34 th number in sequence would be a 60. Adding the 33 rd # to the 34 th # in sequence (the observations 50 + 60 ) and then dividing the result ( 110 ) by 2 , gets you the median of 55. Through the use of the calculator the solution to the Mean, Mode and Standard Deviation are as follows: Mean – 55.61 Standard Deviation - 11.30 Mode - 70 2) Calculate the median only , manually, for the following sample. The calculation of the mean , mode or standard deviation
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This note was uploaded on 12/13/2010 for the course GM 400 taught by Professor - during the Spring '10 term at Keller Graduate School of Management.

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WEEK_6_Discussion_Solution,_Section_B - WEEK #6 DISCUSSION...

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