Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uva-sample-mean-1309-en_uva-sample-mean-1309-en
   name	uva-sample-mean-1309-en
   section	Inferential Statistics/Sampling Distributions/Sample mean
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	2
   p-value	0.5905

   Question

   A student did not prepare for a true-false test that contains 20 questions. Therefore, he guesses at each question. At 70% correct answers he passes. Suppose X is the number of questions to which he gives the correct answer. The probability of that student passing this test can be written as:

   
   
   1. FALSE: P(X = 70%)
   2. FALSE: P(X ≥ 30%)
   3. FALSE: P(X ≥ 70%)
   4. TRUE: P(X ≥ 14)
   5. FALSE: P(X > 15)
   
   
   1. P(X = 70%): Incorrect
   2. P(X ≥ 30%): Incorrect
   3. P(X ≥ 70%): Incorrect
   4. P(X ≥ 14): Correct
   5. P(X > 15): Incorrect