(Solved): WPC 300 : Lab 5: Inferential Quiz Instructions...
Lab 5: Inferential
Quiz Instructions
- Start with datafiles:
- Change the file names to: YourFirstName_YourLastName_XXXX.jmp
- Review what we did in the lab.
- You must use JMP to answer the following multiple-choice questions.
- Note: When you are asked to submit a screen capture, you need to make sure that your name is part of the capture.
Question 1 2 pts
Refer data: pricequote.jmp
Using descriptive statistics, what can you conclude?
Group of answer choices
- Mary’s pricing is more reasonable than that of Barry.
- Barry’s average price is lower than Mary’s average price
- Variation in Mary’s price is higher than Barry’s price
- Barry’s average price is higher than Mary’s average price
Question 2 2 pts
Use a box plot to compare overall all difference in price quoted by Barry and Mary. What is your conclusion?
Group of answer choices
- Barry’s price has larger spread in the population
- Mary’s price has a larger spread in the sample
- Mary’s price has larger spread in the population
- Barry’s price has a larger spread in the sample
Question 3 2 pts
Interquartile range in Mary’s price quote is from:
Group of answer choices
- $133 to $114
- $114 to $105
- $125 to $105
- $133 to $97
Question 4 2 pts
Based on a two-tailed statistical test to infer about the population, what is your conclusion?
Group of answer choices
- Overall, Mary’s prices are significantly higher than Barry’s prices
- Nothing can be inferred as the sample size is really small
- Overall, Barry’s prices are similar to Mary’s prices
- Overall, Barry’s prices are not the same as Mary’s prices.
Question 5 2 pts
To develop a two-tailed statistical test to find the answer to Q4, what is the null hypothesis?
Group of answer choices
- Overall, Barry’s prices are at least $9 higher than Mary’s prices
- Overall, Barry’s prices are the same as Mary’s prices.
- Overall, Barry’s prices are less than Mary’s prices
- Overall, Barry’s prices are more than Mary’s prices
Question 6 2 pts
The conclusion inferred in Q4 is supported by t-test where the obtained p-value is.
Group of answer choices
- More than 0.0284
- Less than 0.986
- Less than 0.05
- Equal to 2.52
Question 7 2 pts
Refer data:SalaryANOVA.jmp.
What is the null hypothesis of the ANOVA analysis of Salary data across majors,
Group of answer choices
- Average salaries of all college majors are very different
- Average salaries of all college majors are the same
- None of the selection is correct
- Average salaries of all college majors are slightly different
Question 8 2 pts
Based on the results obtained from the ANOVA analysis of Salary data across majors,
Group of answer choices
- You reject the null hypothesis
- You reject the alternative hypothesis
- You could not reject the null hypothesis
- You accept the null hypothesis
Question 9 2 pts
Based on the connecting letter report, salaries of which college majors are significantly different?
Group of answer choices
- Language and music
- Social science and music
- Social science and special education
- Science and music
Question 10 2 pts
Support your answer for Q9 by providing an appropriate screenshot.
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