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Author Question: Which one of these X' variables is a discrete random variable? a. An experiment in chemistry is ... (Read 91 times)

daltonest1984

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on: Jul 24, 2018
Which one of these X' variables is a discrete random variable?
 a. An experiment in chemistry is repeated many times and X is the time required for a reaction to occur in seconds.
  b. A student is randomly selected and X is the number of correct answers on a two question multiple-choice quiz.
  c. A UPS package is randomly selected and X is the weight in pounds of the package.
  d. A student is randomly selected and X is the distance they must travel in feet to go from their dorm room door to the door of their first class on Monday morning.

Question 2

In a randomly selected sample of 500 students at a University, 80 say they plan to graduate within 4 years. Calculate a 95 confidence interval for the proportion of all students who plan to graduate within 4 years.


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bpool94

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

B

Answer to Question 2

(0.765, 0.835)


daltonest1984

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Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

Zebsrer

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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