Question
MATH399 Applied Managerial Statistics
Week 5Discussion
Interpreting Normal Distributions
Log onto website where you can observe your service bill for
the last 12 months (electric bill, cell phone bill, water bill,
etc.). If you do NOT feel comfortable sharing this data, you can
make up values.
In excel, list the values of your bill for the last 12 months
on one column.
Find the sample mean and sample standard deviation of your
data.
Pick three bills from the last 12 months and change the
values into z-scores. What does the z-score tell you about that
particular month?
Analysis
Between what two values would be considered a normal bill?
Remember, being within 2 Standard Deviations is considered normal.
Are any of your bills in the last 12 months unusual? Very
unusual?
Are there times when you would accept an “unusual” bill?
Explain.
Other samples, services and questions:
When you use PaperHelp, you save one valuable — TIME
You can spend it for more important things than paper writing.
