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Author Question: Which one of these variables is a binomial random variable? a. Time it takes a randomly selected ... (Read 90 times)

Shelles

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on: Jul 24, 2018
Which one of these variables is a binomial random variable?
 a. Time it takes a randomly selected student to complete a multiple choice exam.
  b. Number of textbooks a randomly selected student bought this term.
  c. Number of women taller than 68 inches in a random sample of 5 women.
  d. Number of CDs a randomly selected person owns.

Question 2

An Anti-Smoking organization wishes to determine what percentage of students in the state of Pennsylvania smoke cigarettes at least once a day. The organization will randomly sample 2400 students. In the sample they obtain, 450 students say they smoke cigarettes at least once a day. Calculate a 95 confidence interval for the proportion of all students in the state of Pennsylvania that smoke cigarettes at least once a day.


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tranoy

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

C

Answer to Question 2

(0.172, 0.203)


Shelles

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Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


tranoy

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Reply #3 on: Jul 24, 2018
Great! Please up vote :D


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