This is the Example 1 Problem Set for OMGT6123 Please
peruse the video
tutorial of the solution posted to the course website.
1. Construct
a stem and leaf plot
for the following data:
NOTE: There are two columns
of data & use
the tens place of the scores as your stems, e.g., for
numbers less than 20 use
the 1 of 10, for numbers between 20 and 30 use the 2 of 20
etc.
|
Scores |
Scores |
|
30 |
28 |
|
31 |
18 |
|
35 |
55 |
|
40 |
26 |
|
45 |
49 |
|
41 |
51 |
|
25 |
32 |
|
20 |
38 |
|
19 |
45 |
|
25 |
41 |
|
32 |
49 |
|
35 |
33 |
|
50 |
21 |
|
51 |
18 |
|
53 |
55 |
|
45 |
26 |
|
44 |
29 |
|
37 |
31 |
|
29 |
20 |
2. Construct a
histogram for
question 1. Use
below 10, 20, 30, 40,
and 50 as your bins with the actual bin values as 10, 20,
30, 40, &
50. What can we
tell about the data set
from the stem & leaf plot & the histogram?
3. Calculate
the following
descriptive statistics for each data set:
a. Mean
b. Median
c. Interquartile
Range
d. Standard
Deviation
c. Comment
on each of the descriptive
statistics, comparing mean to median & IQR to
standard deviation noting similarities &/or differences