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(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. 

Upload 

 



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