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Author Question: A researcher wishes to estimate the proportion of people within a certain population who are HIV ... (Read 113 times)

tuffie

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on: Jul 25, 2018
A researcher wishes to estimate the proportion of people within a certain population who are HIV positive. Obtain a sample size that will ensure a margin of error of at most 4.8 percentage points for a 95 confidence interval.
 
  Assume that it is reasonable to presume that the percentage of those sampled who are HIV positive will be between 3 and 7.
  A) 49 B) 417 C) 109 D) 117

Question 2

The probability that a radish seed will germinate is 0.7. A gardener plants seeds in batches of 13. Find the standard deviation for the random variable X, the number of seeds germinating in each batch.
 
  A) 1.587 B) 1.632 C) 1.652 D) 1.568


alexanderhamilton

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Reply #1 on: Jul 25, 2018
Answer to Question 1

C

Answer to Question 2

C


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tuffie

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Reply #2 on: Jul 25, 2018
Thank you!


alexanderhamilton

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Reply #3 on: Jul 25, 2018
Always glad to help...


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