Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-distribution-1850-en_uva-distribution-1850-en
   name	uva-distribution-1850-en
   section	Distributions/Continuous/t-distribution
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.786
   p-value	0.8231

   Question

   From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 12, mean = 51, sd = 11.46 Sample 2: n = 19, mean = 34, sd = 9.28. The pooled variance estimator takes the value 103.27. 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 12 and 19 degrees of freedom
   2. FALSE: A T distribution with 31 degrees of freedom
   3. FALSE: An F-division with 11 and 18 degrees of freedom
   4. TRUE: A T distribution with 29 degrees of freedom
   
   
   1. An F-distribution with 12 and 19 degrees of freedom: Incorrect
   2. A T-division with 31 degrees of freedom: Incorrect
   3. An F-division with 11 and 18 degrees of freedom: Incorrect
   4. A T-division with 29 degrees of freedom: Correct