Arrivals at an Airport At a Small rural airport, the

Chapter 5, Problem 9RE

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QUESTION:

Problem 9RE

Arrivals at an Airport At a Small rural airport, the number of arrivals per hour during the day has the distribution shown. Find the mean, variance, and standard deviation for the data. (5−2)

NumberX

5

6

7

S

9

10

Probability P(X)

0.14

0.21

0.24

0.18

0.16

0.07

Questions & Answers

QUESTION:

Problem 9RE

Arrivals at an Airport At a Small rural airport, the number of arrivals per hour during the day has the distribution shown. Find the mean, variance, and standard deviation for the data. (5−2)

NumberX

5

6

7

S

9

10

Probability P(X)

0.14

0.21

0.24

0.18

0.16

0.07

ANSWER:

Solution

Step 1 of 2

We have to find the Mean, Variance and Standard deviation of the given distribution

The given distribution is

Numbers(X)

5

6

7

8

9

10

Probability P(X)

0.14

0.21

0.24

0.18

0.16

0.07

Mean=

         =

         =5(0.14)+6(0.21)+7(0.24)+8(0.18)+9(0.16)+10(0.07)

         =7.22


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