In a study of whether or not a new weight loss plan is ...

[Haya94]

  In a study of whether or not a new weight loss plan is effective, the weight of individuals before the weight loss plan is started and the weights of the same individuals after six weeks is recorded. What is the test statistic for testing the hypothesis that the weight loss plan is not effective given n = 20, , and s_d = 3.50?
 

  a.t = 0
  b.t = 12.5
  c.It depends on the value for which is not given.
  d.t = 15.97

Question 2

  What can be concluded from the following Minitab output of the paired data in a study of how a set of students performs on the final exam in each of two classes?
 
 

  a.There is a statistically significant difference between how the students perform on the finals in Class 101 and Class 201 at the level.
  b.There is no statistically significant difference between how the students perform on the finals in Class 101 and Class 201 at the level.
  c.There is no statistically significant difference between how the students perform on the finals in Class 101 and Class 201 at the level.
  d.Since the mean difference is -2.50 we can conclude that students perform better on the final for Class 201 than they do for Class 101 at the level.

[kaykay69]

Answer to Question 1

correct: d

Answer to Question 2

correct: b

[Haya94]

Great answer, keep it coming

[Joy Chen]

Gracias!