Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1869-en_uva-distribution-1869-en
   name	uva-distribution-1869-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.943
   p-value	0.7865

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 13, mean = 26, sd = 10.92 Sample 2: n = 10, mean = 22, sd = 11.81. The pooled variance estimator takes the value 127.92. It is tested Whether the population averages are equal. The corresponding test size follows, if the null hypothesis is TRUE,

   
   
   1. TRUE: A T-distribution with 21 degrees of freedom
   2. FALSE: An F-division with 12 and 9 degrees of freedom
   3. FALSE: A T distribution with 23 degrees of freedom
   4. FALSE: An F-division with 13 and 10 degrees of freedom
   
   
   1. A T-distribution with 21 degrees of freedom: Correct
   2. An F-division with 12 and 9 degrees of freedom: Incorrect
   3. A T-division with 23 degrees of freedom: Incorrect
   4. An F-division with 13 and 10 degrees of freedom: Incorrect