Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1877-en_uva-distribution-1877-en
   name	uva-distribution-1877-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.718
   p-value	0.8437

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 15, mean = 42, sd = 12.37 Sample 2: n = 11, mean = 53, sd = 6.99. The pooled variance estimator takes the value 109.62. 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 26 degrees of freedom
   2. FALSE: An F-division with 15 and 11 degrees of freedom
   3. FALSE: An F-division with 14 and 10 degrees of freedom
   4. TRUE: A T distribution with 24 degrees of freedom
   
   
   1. A T-distribution with 26 degrees of freedom: Incorrect
   2. An F-division with 15 and 11 degrees of freedom: Incorrect
   3. An F-division with 14 and 10 degrees of freedom: Incorrect
   4. A T-division with 24 degrees of freedom: Correct