Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Null-hypothesis-813-en_uu-Null-hypothesis-813-en
   name	uu-Null-hypothesis-813-en.Rmd
   section	Inferential Statistics/NHST/Hypothesis/Null hypothesis
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Case
   Language	English
   Level	Statistical Literacy

   Question

   As part of a customer satisfaction survey, the managers of a university dining hall asked 280 students how much they liked different types of food (pre-test). They found that sushi was the most positively evaluated type of food. Based on this survey, the managers decided to offer sushi as part of the lunch menu. Three months later, they re-contacted the respondents who took part in the first survey and asked them again how much they liked sushi (post-test). The dining hall managers wanted to know if students’ appreciation of sushi had changed since the first survey.

   They found the following results:

   

   Using a significance level of .01, which conclusion should they draw from their data?

   
   
   1. FALSE: There is no significant change in students’ appreciation of sushi, so they should reject the null hypothesis.
   2. FALSE: There is no significant change in students’ appreciation of sushi, so they should not reject the null hypothesis.
   3. FALSE: There is a significant change in students’ appreciation of sushi, so they should not reject the null hypothesis.
   4. TRUE: There is a significant change in students’ appreciation of sushi, so they should reject the null hypothesis.
   
   
   1. This answer is incorrect.
   2. This answer is incorrect.
   3. This answer is incorrect.
   4. This answer is correct.