Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Null-hypothesis-801-en_uu-Null-hypothesis-801-en
   name	uu-Null-hypothesis-801-en
   section	Inferential Statistics/NHST/Hypothesis/Null hypothesis
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	Case
   Program
   Language	English
   Level	Statistical Literacy

   Question

   An occupational and organizational psychologist is interested in the relationship between the degree of attachment to the company (interval scale) and the number of days of illness in a year. In a random sample of 30 employees, she finds a correlation of $r = .37$.

   What is the null hypothesis when the presence of a correlation is tested?

   
   
   1. FALSE: $H_0: r = 0$
   2. FALSE: $H_0: r > 0$
   3. TRUE: $H_0: \rho = 0$
   4. FALSE: $H_0: \rho > 0$
   
   

   Solution

   A hypothesis is a statement about the value in the population ($\rho$). A null hypothesis always states that there is no correlation: ($\rho=0$).

   
   
   1. A hypothesis is a statement about the value in the population and not in the sample.
   2. A hypothesis is a statement about the value in the population and not in the sample.
   3. This is the correct null hypothesis.
   4. A null hypothesis always states that there is no correlation.