MBA 501A – [STATISTICS] ASSIGNMENT 3 - 6 Multipart (13 Parts) Questions Solved using Minitab
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questions_6.docMBA 501A – [STATISTICS]
ASSIGNMENT 3
[15 pts] 1. Use the data set TVHRS.MTW in the Student 14 Folder.
[5 pts] (a) Construct a 95% confidence interval for the proportion of viewers who watch Sesame Street.
[5 pts] (b) Construct a 99% confidence interval for the proportion of viewers who watch Sesame Street.
[5 pts] (c) Interpret your results.
[20 pts] 2. Use the data set SURVEYMTW in the Student 14 folder.
[10 pts] (a) At
05
.
=
a
, test whether at least 50% of students do not engage in vigorous exercise. Interpret your results.[10 pts] (b) At
05
.
=
a
, test if the percentage of students who are colorblind equals 90%. Interpret your results.
[10 pts] 3. Use the data set BACKPAIN.MTW in the Student 14 folder. Are males and females equally likely to suffer from back pain (hint: this is a two tailed test of a proportion)? Use
05
.
=
a
.[15 pts] 4. Use the data file TEMCO.MTW in the Student 14 folder.
[5 pts] (a) Construct a 95% confidence interval for the mean number of years employed at Temco.
[5 pts] (b) Construct a 95% confidence interval for the mean number of prior years’ experience.
[5 pts] (c) Interpret your results.
[20 pts] 5. Use the data file ASSESS.MTW in the Student14 Folder.
[10 pts] (a) At
05
.
=
a
, test whether 25% of homes have no garage. Explain your results.[10 pts] (b) Test whether the mean number of rooms is at least 8. Use
05
.
=
a
. Explain your results.[20 pts] 6. Use the data file ACADEME.MTW in the Student 14 folder.
[10 pts] (a) At
05
.
=
a
, test whether the average salary for femaleassistant professors is $50,000 (note that salaries are in 1000s of dollars). Interpret your results.
[10 pts] (b) At
05
.
=
a
, test whether the average number of male full professors at four year colleges is at most 150. Interpretyour results.
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