Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1855-en_uva-distribution-1855-en
   name	uva-distribution-1855-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.941
   p-value	0.7911

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 19, mean = 38, sd = 3.03 Sample 2: n = 11, mean = 31, sd = 11.82. The pooled variance estimator takes the value 55.8. 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 28 degrees of freedom
   2. FALSE: An F-division with 18 and 10 degrees of freedom
   3. FALSE: An F-division with 19 and 11 degrees of freedom
   4. FALSE: A T distribution with 30 degrees of freedom
   
   
   1. A T-distribution with 28 degrees of freedom: Correct
   2. An F-division with 18 and 10 degrees of freedom: Incorrect
   3. An F-division with 19 and 11 degrees of freedom: Incorrect
   4. A T-division with 30 degrees of freedom: Incorrect