# Project #15400 - Homework

## STATISTICS

Note:  Show all work and wherever you are being asked to perform a hypothesis test, be sure to state your null and alternative hypotheses, your rejection criteria, your test statistic, your conclusion, and interpret the results.

Ch 6

1.)                The number of pizzas ordered on Friday evenings between 5:30 and 6:30 at a pizza delivery location for the last 10 weeks is shown below.

58, 46, 55, 39, 42, 63, 54, 55, 61, 52

a)      Develop a forecast for the 11thth week using a three period moving average

b)      Use exponential smoothing constants of α = .2 and α = .8 to forecast pizza orders for week 11. Compare your forecasts using MSE. Which smoothing constant would you prefer?

Ch 13

2.)                Mary Yetter, a staff analyst at the Los Angeles plant of Computer Products Corporation, is assigned to the team that is developing the process design for producing a bar code scanner. The corporate planning group in San Jose, California has contacted her and has asked how confident the design group is about completing the project in 60 days.  She has developed these estimated time durations in days for the project:

 Activity Immediate Predecessor Activities Optimistic Time Most Likely Time Pessimistic Time A -- 10 12 15 B A 6 10 14 C A 10 15 20 D A 9 9 18 E B 5 6 8 F C,E 10 12 13 G B 12 14 16 H B,D 18 21 24 I B,D 10 15 20 J F.G.H 8 10 14

a.   Compute the expected time and variance for each activity.

b.   Determine the critical path and the expected duration of the project.

c.   What is the probability that the project will take longer than 58 days to complete?

 Subject Mathematics Due By (Pacific Time) 10/28/2013 10:00 am
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