Business Decision Making

Business Decision Making
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Contents
Task 1: Ungrouped Descriptive Statistics........................................................................................3
1. Find out following:.............................................................................................................3
Mean:......................................................................................................................................3
Minimum:...............................................................................................................................3
Standard deviation:.................................................................................................................3
Coefficient of variation:.........................................................................................................3
2..............................................................................................................................................3
Task 2: Grouped Descriptive Statistics............................................................................................4
1. Summarising grouped data:................................................................................................4
2..............................................................................................................................................5
3. Linear interpolation:...........................................................................................................6
4..............................................................................................................................................6
Task 3: Relationships.......................................................................................................................7
1..............................................................................................................................................7
2..............................................................................................................................................7
3..............................................................................................................................................7
4..............................................................................................................................................7
Task 4: Networking..........................................................................................................................8
1..............................................................................................................................................8
2..............................................................................................................................................8
3..............................................................................................................................................8
Task 5...............................................................................................................................................9
1..............................................................................................................................................9
2..............................................................................................................................................9
3..............................................................................................................................................9
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Task 1: Ungrouped Descriptive Statistics
1. Find out following:
Mean:
Sum = 4702
Total sample size = 120
Mean = Sum / sample size
= 4702 / 120
= 39.1833
The resulted mean depicts that average age of the Netflix’s viewer is around 39.1833 or 390
years.
Minimum:
Range = Maximum – Minimum
65 = 80 – Minimum
Thus, the minimum = 80 – 65 = 15
Standard deviation:
Standard deviation = √variance
= √163.4
= 12.7828
The standard deviation figure computed above depicts that aggregate variance of age of viewers
age varies by 12.7828.
Coefficient of variation:
Coefficient of variance = standard deviation / mean
= (12.7828/ 39.1833) × 100
= 32.62%
The resulted COV shows that average age of Netflix viewers deviated from the mean value by
32.62%. Which indicates that mostly viewers are of age around 39 years.
2.
The mean value of sample of 120 subscribers is 39.18 which shows that most common viewer age
of Netflix is 39 years. While Median of the data set is 43 which merely describes that in selected
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