Suppose that for a given computer salesperson, the probability distribution of x = the number of systems sold in 1 month is given by the following table. 1 4 6 7 8 P(x) 0.06 0.10 0.11 0.30 0.29 0.12 0.01 0.01 (a) Find the mean value of x (the mean number of systems sold). 4.13 (b) Find the variance and standard deviation of x. (Round your standard deviation to four decimal places.) variance 2.03 standard deviation 1.4248 How would you interpret these values? (Round your standard deviation to four decimal places.) The mean squared deviation from the mean number of systems sold in one month is 2.0 v . A typical deviation from the mean number of systems sold in one month is 1.8331 (c) What is the probability that the number of systems sold is within 1 standard deviation of its mean value? 0.72 (d) What is the probability that the number of systems sold is more than 2 standard deviations from the mean? 0.6994

Suppose that for a given computer salesperson, the probability distribution of x = the number of systems sold in 1 month is given by the following table. 1 4 6 7 8 P(x) 0.06 0.10 0.11 0.30 0.29 0.12 0.01 0.01 (a) Find the mean value of x (the mean number of systems sold). 4.13 (b) Find the variance and standard deviation of x. (Round your standard deviation to four decimal places.) variance 2.03 standard deviation 1.4248 How would you interpret these values? (Round your standard deviation to four decimal places.) The mean squared deviation from the mean number of systems sold in one month is 2.0 v . A typical deviation from the mean number of systems sold in one month is 1.8331 (c) What is the probability that the number of systems sold is within 1 standard deviation of its mean value? 0.72 (d) What is the probability that the number of systems sold is more than 2 standard deviations from the mean? 0.6994

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Estimation

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Question

Suppose that for a given computer salesperson, the probability distribution of x = the number of systems sold in 1 month is given by the following table.
1
3
4
7
8
p(x)
0.06
0.10
0.11
0.30
0.29
0.12
0.01
0.01
(a) Find the mean value of x (the mean number of systems sold).
4.13
(b) Find the variance and standard deviation of x. (Round your standard deviation to four decimal places.)
variance
2.03
standard deviation
1.4248
How would you interpret these values? (Round your standard deviation to four decimal places.)
The mean squared deviation from the mean number of systems sold in one month is 2.0
A typical deviation from the mean number of systems sold in one month is
1.8331
(c) What is the probability that the number of systems sold is within 1 standard deviation of its mean value?
0.72
(d) What is the probability that the number of systems sold is more than 2 standard deviations from the mean?
0.6994

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