Pizza Deliveries A pizza shop owner determines the number

Chapter 5, Problem 10E

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QUESTION:

Problem 10E

Pizza Deliveries A pizza shop owner determines the number of pizzas that are delivered each day. Find the mean, variance, and standard deviation for the distribution shown. If the manager stated that 45 pizzas were delivered on one day. do you think that this is a believable claim?

Number of deliveriesX

35

36

37

38

39

ProbabilityP(X)

0.1

0.2

0.3

0.3

0.1

Questions & Answers

QUESTION:

Problem 10E

Pizza Deliveries A pizza shop owner determines the number of pizzas that are delivered each day. Find the mean, variance, and standard deviation for the distribution shown. If the manager stated that 45 pizzas were delivered on one day. do you think that this is a believable claim?

Number of deliveriesX

35

36

37

38

39

ProbabilityP(X)

0.1

0.2

0.3

0.3

0.1

ANSWER:

Solution

Step 1 of 3

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

The given distribution is

No.of pizza deliveries(X)

35

36

37

38

39

Probability P(X)

0.1

0.2

0.3

0.3

0.1

Mean=

         =

         =35(0.1)+36(0.2)+37(0.3)+38(0.3)+39(0.1)

         =37.1


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