Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1879-en_uva-distribution-1879-en
   name	uva-distribution-1879-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.848
   p-value	0.8081

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 12, mean = 26, sd = 7.48 Sample 2: n = 15, mean = 57, sd = 8.91. The pooled variance estimator takes the value 69.08. 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 25 degrees of freedom
   2. FALSE: An F-division with 12 and 15 degrees of freedom
   3. FALSE: An F-division with 11 and 14 degrees of freedom
   4. FALSE: A T distribution with 27 degrees of freedom
   
   
   1. A T-distribution with 25 degrees of freedom: Correct
   2. An F-division with 12 and 15 degrees of freedom: Incorrect
   3. An F-division with 11 and 14 degrees of freedom: Incorrect
   4. A T-division with 27 degrees of freedom: Incorrect