BUS 308 Statistics for Managers Week 4 Assignment
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| Week 4 | Confidence Intervals and Chi Square (Chs 11 - 12) | ||||||||||||
| For questions 3 and 4 below, be sure to list the null and alternate hypothesis statements. Use .05 for your significance level in making your decisions. | |||||||||||||
| For full credit, you need to also show the statistical outcomes - either the Excel test result or the calculations you performed. | |||||||||||||
| 1 | Using our sample data, construct a 95% confidence interval for the population's mean salary for each gender. | ||||||||||||
| Interpret the results. How do they compare with the findings in the week 2 one sample t-test outcomes (Question 1)? | |||||||||||||
| Mean | St error | t value | Low | to | High | ||||||||
| Males | |||||||||||||
| Females | |||||||||||||
| <Reminder: standard error is the sample standard deviation divided by the square root of the sample size.> | |||||||||||||
| Interpretation: | |||||||||||||
| 2 | Using our sample data, construct a 95% confidence interval for the mean salary difference between the genders in the population. | ||||||||||||
| How does this compare to the findings in week 2, question 2? | |||||||||||||
| Difference | St Err. | T value | Low | to | High | ||||||||
| Yes/No | |||||||||||||
| Can the means be equal? | Why? | ||||||||||||
| How does this compare to the week 2, question 2 result (2 sampe t-test)? | |||||||||||||
| a. | Why is using a two sample tool (t-test, confidence interval) a better choice than using 2 one-sample techniques when comparing two samples? | ||||||||||||
| 3 | We found last week that the degree values within the population do not impact compa rates. | ||||||||||||
| This does not mean that degrees are distributed evenly across the grades and genders. | |||||||||||||
| Do males and females have athe same distribution of degrees by grade? | |||||||||||||
| (Note: while technically the sample size might not be large enough to perform this test, ignore this limitation for this exercise.) | |||||||||||||
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BUS 308 Statistics for Managers Week 4 Assignment
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bus308_week_4_data_questions_answer.xls- bus308_week_4_data_questions.xls
- data_set-3.xls
