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Author Question: Suppose that in a large population, the proportion that is left-handed is p = 0.10 . Suppose n = 20 ... (Read 100 times)

Diane

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on: Jul 24, 2018
Suppose that in a large population, the proportion that is left-handed is p = 0.10 . Suppose n = 20 people will be randomly selected and X = number of people in the sample who are left-handed. What probability model should be used to find the probability that X = 3?
 a. Binomial
  b. Normal
  c. Uniform
  d. Chi-square

Question 2

A random sample of 40 men drank an average of 20 cups of coffee per week during finals, while a sample of 30 women drank an average of 15 cups of coffee per week. The sample standard deviations were 6 cups for the men and 3 cups for the women. The standard error for the difference between the two sample means is
 a. 1.095
  b. 1.200
  c. 1.549
  d. 2.400


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vickybb89

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

A

Answer to Question 2

A


Diane

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


vickybb89

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


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