Ungrouped Descriptive Statistics for Decision Making

Business
Decision
Making

Table of Contents
TASK 1............................................................................................................................................3
Ungrouped Descriptive Statistics................................................................................................3
1. Find out following:..................................................................................................................3
Mean:...........................................................................................................................................3
Minimum:....................................................................................................................................3
Standard deviation:......................................................................................................................3
Coefficient of variation:...............................................................................................................3
2....................................................................................................................................................4
Task 2: Grouped Descriptive Statistics............................................................................................4
1. Summarising grouped data:.....................................................................................................4
2....................................................................................................................................................5
3. Linear interpolation:.................................................................................................................6
4....................................................................................................................................................6
Task 4: Networking..........................................................................................................................7
1....................................................................................................................................................7
2....................................................................................................................................................7
3....................................................................................................................................................7
REFERENCES................................................................................................................................8

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 views mean depicts that average age for the Netflix’s viewer is around 39.1833 or 39.2 years
(Wild, Utts and Horton, 2018).
Minimum:
Range = Maximum – Minimum
65 = 80 – Minimum
Thus, the minimum = 80 – 65 = 15
Standard deviation:
Standard deviation = √variance
= √163.4
= 12.7828
The result of SD of 12.8 suggests that the distribution of the Age of UK Netflix viewers are not
very spread out about mean value of 39.2 outliers can make SD very large.
Coefficient of variation:
Coefficient of variance = standard deviation / mean
= (12.7828/ 39.1833) × 100
= 32.62%
This measures the spread of the data around the mean. The distribution of the age of UK Netflix
viewers has a relatedly low spread of 32.7% which is less than 1 and close to the mean.
The mean and median are not far apart at 39.18 or 39years and 43years respectively. While the
mean shows the average age of UK Netflix viewers, the median shows that 50% of the age