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# Probability: XYZ Company Sample Question

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*PLEASE SHOW ALL WORK FOR COMPLETING THIS PROBLEM SO THAT I KNOW HOW TO DO IT IN FUTURE SITUATIONS*

From past information, XYZ has collected the following data for the # of building losses per year for their 80 buildings.

# of building losses per year # of buildings having these losses
0 40
1 25
2 10
3 5
4 ??

A) derive the probability distribution for frequency based on the information above, and make sure your answer is labeled properly so that I know what it is, thank you.

B) Calculate the expected value of frequency for XYZ Company.

C) Calculate the Standard Deviation for XYZ Company.

https://brainmass.com/statistics/probability/probability-xyz-company-sample-question-431035

#### Solution Preview

Since there are 80 buildings in total, ?? = 10 (80 - 40 - 25 - 5)

The following is the distribution of looses.

# of building losses per year Probability
0 40/80 = 0.5

1 25/80 = ...

#### Solution Summary

XYZ Company sample questions are examined in the solution. The expert expected value of frequency for XYZ Company is given.

\$2.19

## Probability, confidence interval, analysis sample questions

The area under the normal curve between z=1 and z=2 is ________________ the area under the normal curve between z=2 and z=3.
A. Greater than
B. Less than
C. Equal to
D. A, B or C above dependent on the value of the mean
E. A, B or C above dependent on the value of the standard deviation

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