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Author Question: 100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and ... (Read 38 times)

james0929

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on: Jul 25, 2018
100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and only 45 said yes. Identify the sample and population.
 
  A) Sample: the 45 of adults who drink at least 48 oz of water; population: all adults
  B) Sample: the 100,000 selected adults; population: the 45 of adults who drink at least 48 oz of water
  C) Sample: all adults ; population: the 100,000 selected adults
  D) Sample: the 100,000 selected adults; population: all adults

Question 2

Lengths of pregnancies are normally distributed with a mean of 268 days and a standard
  deviation of 15 days. (a) Find the probability of a pregnancy lasting more than 250 days.
  (b) Find the probability of a pregnancy lasting more than 280 days.
 
  Draw the diagram for
  each and discuss the part of the solution that would be different to finding the requested
  probabilities.


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braelync

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

D

Answer to Question 2

Both (a) and (b) are solved by subtracting the area score from 1.


james0929

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


braelync

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


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