Author Question: A researcher wishes to estimate the proportion of people within a certain population who are HIV ... (Read 100 times)

tuffie

  • Hero Member
  • *****
  • Posts: 534
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

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

C

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

For a complete list of videos, visit our video library