Selected Statistical Problems with ANOVA and Regression Analysis

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Some Selected Statistical Problems
Student Name: Student ID:
Unit Name: Unit ID:
Date Due: Professor Name:

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Answer 1
1.A Frequency, relative frequency, percentage frequency with class limit points and mid
points are evaluated and represented in the frequency table below (Black, 2009)
Table 1: Frequency Distribution table

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1.B The above frequency table was used to draw the histogram and help of MS Excel has
been taken for the purpose of drawing the diagram with percentage frequencies.
$145.00 $195.00 $245.00 $295.00 $345.00 $395.00 $445.00 $495.00
0%
5%
10%
15%
20%
25%
30%
35%
16%
30%
24%
8% 10%
4% 4% 4%
PERCENTAGE RELATIVE FREQUENCY
PERCNT.REL.FREQ
BIN
Percentage of frequency
Figure 1: Histogram of the percent frequency distribution
1.C The nature of the histogram was not normal, rather right skewed, which reflected that the
data in the data set of Missy Walters were accumulated with high frequencies in the left tail.
Median is used as a measure of central tendency when distribution is not normal in nature and
hence it (median) was the best choice of measure of location. Mean can be used for any data set
without outliers, but median is considered as a better choice as measure and was the appropriate
selection as measure of location for this scenario (Montgomery, Runger & Hubele, 2009)