Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-central-limit-theorem-1366-en_uva-central-limit-theorem-1366-en
   name	uva-central-limit-theorem-1366-en
   section	Distributions/Limit Theorems/Central Limit Theorem
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	3
   p-value	0.311

   Question

   The pH (acidity) of the liquid is crucial for regulation of the dye absorption in cashmere sweaters. Research shows that the pH in a normal distribution varies with a mean of 4.22 and a standard deviation of 0.127. You will take a random sample of 10 sweaters. What then is the 95% confidence interval of the sample mean?

   
   
   1. FALSE: 1,61 ± 1,96(0,04)
   2. TRUE: 4,22 ± 1,96(0,04)
   3. FALSE: 4,22 ± 1,96(0,127)
   4. FALSE: 4,22 ± 1,96(2,236)
   
   
   1. 1,61 ± 1,96(0,04): Incorrect
   2. 4,22 ± 1,96(0,04): Correct
   3. 4,22 ± 1,96(0,127): Incorrect
   4. 4,22 ± 1,96(2,236): Incorrect