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Author Question: From a population of 500 elements, a sample of 225 elements is selected. It is known that the ... (Read 102 times)

captainjonesify

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on: Jun 24, 2018
From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900 . The standard error of the mean is approximately _____.
 a. 1.1022
  b. 2
  c. 30
  d. 1.4847

Question 2

A local university reports that 3 of its students take their general education courses on a pass/fail basis. Assume that 50 students are registered for a general education course.
 a. Define the random variable in words for this experiment.
  b. What is the expected number of students who have registered on a pass/fail basis?
  c. What is the probability that exactly 5 are registered on a pass/fail basis?
  d. What is the probability that more than 3 are registered on a pass/fail basis?
  e. What is the probability that less than 4 are registered on a pass/fail basis?


TheDev123

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Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a. x = the number of student out of 50 who are registered for a general education course
b. 1.5
c. .0131
d. .0628
e. .9372


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