Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1870-en_uva-distribution-1870-en
   name	uva-distribution-1870-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.906
   p-value	0.802

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 18, mean = 47, sd = 10.81 Sample 2: n = 10, mean = 29, sd = 12.64. The pooled variance estimator takes the value 131.71. It is tested whether the population averages are equal. The corresponding test size follows, if the null hypothesis is TRUE,

   
   
   1. FALSE: An F-distribution with 18 and 10 degrees of freedom
   2. TRUE: A T distribution with 26 degrees of freedom
   3. FALSE: An F-division with 17 and 9 degrees of freedom
   4. FALSE: A T distribution with 28 degrees of freedom
   
   
   1. An F distribution with 18 and 10 degrees of freedom: Incorrect
   2. A T-division with 26 degrees of freedom: Correct
   3. An F-division with 17 and 9 degrees of freedom: Incorrect
   4. A T-division with 28 degrees of freedom: Incorrect