A study was conducted of the 12-month earnings per share for two categories of airline companies. Large Airlines Small Airlines $4.36 6.19 - 0.42 3.73 0.26 6.27 $1.60 -1.98 1.03 -0.21 -1.15 4.19 0.59 1.52 1.97 4.57 0.05 Based on the above data, use EXCEL to find mean, median, mode, variance, range and coefficient of variation
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
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The University of the Gambia
Homework 3 (Excel)
A study was conducted of the 12-month earnings per share for two categories of airline companies.
1.
Large Airlines
Small Airlines
$4.36
6.19
- 0.42
3.73
0.26
6.27
$1.60
-1.98
1.03
-0.21
-1.15
4.19
0.59
1.52
1.97
4.57
0.05
Based on the above data, use EXCEL to find mean, median, mode, variance, range and
coefficient of variation
2.
The salaries (in thousands of dollars) for a sample of 13 employees of a firm are: 26.5, 23.5, 29.7,
24.8, 21.1, 24.3, 20.4, 22.7, 27.2, 23.7, 24.1, 24.8, and 28.2. Use EXCEL to find mean, median,
mode, variance, range and coefficient of variation
3.
Between 1980 and 1989, constant dollar spending on non-residential construction in the United
States (in billions of dollars) was as follows:
Year
1981
1982
1983
1984
1985
1986
1987
1988
1989
Spending 27.6
30.8
37.8
40.0
36.9
36.0
38.4
35.7
34.7
35.3
Using EXCEL draw a scatter diagram, line graph and a bar chart."
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