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Suppose 50 drug test results are given from people who use drugs (see table below): If...

  1. Suppose 50 drug test results are given from people who use drugs (see table below):

If 2 of the 50 subjects are randomly selected without replacement, find the probability that the first person tested positive and the second person tested negative.

_______________

Positive Test Results:

44

Negative Test Results:

6

Total Results:

50
  1. A comprehensive final exam in STAT 200 has a mean score of 73 with a standard deviation of 7.8. Assume the distribution of the exam scores is approximately normal. If 24 students are randomly selected, find the probability that the mean of their exam scores is less than 70.

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Expert Solution

NOTE- For your refrence i am uploading z-table too with the highlighted value,

milcah answered 2 years ago
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