Question

In: Statistics and Probability

Find the mean, median, mode, and mid range. Then decide which you think is the most...

Find the mean, median, mode, and mid range. Then decide which you think is the most meaningful measure of average for that data set.

12) The data below show the number of attorneys employed by the 10 largest law firms in pittsburgh.
87. 109. 57. 221. 175. 123. 170. 80. 66. 80.

25) in a study of the time in minutes it takes an untrained mouse to run a maze, a researcher recorded the data in seconds.

Class | Frequency
2.1-2.7. | 5
2.8 - 3.4 | 7
3.5-4.1 | 12
4.2-4.8 | 14
4.9-5.5| 16
5.6-6.2| 8

Solutions

Expert Solution

12)

X (X - X̄)²
total sum 1168 26927.60
n 10 10

mean =    ΣX/n =    1168.000   /   10   =   116.80
mode= highest frequency data =    80
Median=0.5(n+1)th value =    5.5th   value of sorted data
=   98.000  
range=max-min =    221   -   57   =   164

mid range=(max + min)/2= (   221   +   57   ) /2 =    139

MEDIAN WILL BE THE BEST MEASURE OF AVERAGE
...................

25)

.................

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