Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1890-en_uva-distribution-1890-en
   name	uva-distribution-1890-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.942
   p-value	0.7896

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 19, mean = 23, sd = 3.41 Sample 2: n = 13, mean = 45, sd = 7.17. The pooled variance estimator takes the value of 27.54. It is tested whether the population averages are equal. The corresponding test size follows, if the null hypothesis is TRUE,

   
   
   1. FALSE: A T distribution with 32 degrees of freedom
   2. TRUE: A T distribution with 30 degrees of freedom
   3. FALSE: An F-division with 18 and 12 degrees of freedom
   4. FALSE: An F-division with 19 and 13 degrees of freedom
   
   
   1. A T-distribution with 32 degrees of freedom: Incorrect
   2. A T-division with 30 degrees of freedom: Correct
   3. An F-division with 18 and 12 degrees of freedom: Incorrect
   4. An F-division with 19 and 13 degrees of freedom: Incorrect