Lab Assignment 5.3.2 Name: Date: Course: Data CD Number: Section: Start a Minita

Question

Lab Assignment 5.3.2 Name: Date: Course: Data CD Number: Section: Start a Minitab session. If you are unable to complete this lab assignment in one Minitab 1. session, save the project as Lab 5-3-2. Never use a period as part of the project name:sitab Minitab uses the period to attach the file type to the file name. Then at your next Minit session, you may open this Lab 5-3-2.MPJ project and continue to work where you leito previously. 2. the proportion of people who have changed their commuting means from private automobile to public transportation. They randomly selected 35 people who drove their own car to wo in 2007 and asked them if they had switched to public transportation. The results of ths survey were: D,C,D,D,D.c,D,D,c.D.D.c.D,D,D,c,D,D.D,D,c,D,D,D.D. D,D,C,D,D,D,D,D, C and D where C - changed to public transportation and D = still drive private automobile to work. Enter the data into column 1 ofthe current Worksheet Window using the alphabetic symbols C and D. Since C is the "success" outcome, code the D to 0 and the C to 1 and place these coded values into column 2. Name this 2nd column Commuter Choice. Compute a 90% confidence interval for the proportion of all American commuters by private automobile in 2007 who have changed to commuting by public transportation in 2008 The National Football League's Super Bowl is one of the most watched television programs in the United States. A survey of randomly selected homes was taken this past January, and each household was asked if it was watching television, and if so, what program it was viewing. The possibilities were SuperBowl, Heros, Housewives, Bones, Girlfriends and None (television not turned on). The results of this survey are in worksheet that is saved on your data disc. Choose an empty column and name it Survey Then code any None responses as missing data. For text data, this needs to be a and would be done by coding None to (two quotes with no space between them). Code all other non SuperBowl responses as Other. Now display the data in this Survey column in the Session Window. Then compute a 95% confidence interval for the United States households watching television which were tuned to the 3 the Tvsurvey.mtw n empty cell; proportion of all (lab assignment is continued on the second side of this page) 127

Explanation / Answer

Answer:

Question 2

Test and CI for One Proportion: C3

Method

Event: C3 = 1

p: proportion where C3 = 1

Normal approximation method is used for this analysis.

Descriptive Statistics

N

Event

Sample p

90% CI for p

35

8

0.228571

(0.111823, 0.345320)

90% CI for proportion is (0.111823, 0.345320).

Event: C3 = 1

p: proportion where C3 = 1

Normal approximation method is used for this analysis.

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