Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufsw-confidence_intervals-1270-en_vufsw-confidence_intervals-1270-en
   name	vufsw-confidence intervals-1270-en
   section	inferential statistics/confidence intervals
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	conceptual
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   A 95% confidence interval for the difference between two sample means is (-0.08, 0.15). Which of the following statements is correct?

   
   
   1. FALSE: The probability is 0.95 that a significant difference between the population means is between -0.08 and 0.15.
   2. TRUE: If we would randomly draw such two samples a 100 times, then the difference between their means is between -0.08 and 0.15 in 95 of the cases.
   3. FALSE: The probability is 0.05 that a significant difference between the population means is between -0.08 and 0.15.
   4. FALSE: We have 5% certainty that the true difference between the population means is between -0.08 and 0.15.
   
   

   Solution

   If a 95% confidence interval for the difference between two population means is (-0.08, 0.15), we have 95% certainty that the ‘true’ difference between the population means is between -0.08 and 0.15.

   
   
   1. False
   2. True
   3. False
   4. False