MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Thirty two percent of all Americans drink bottled water more than once a week.  (Natural resources defense council,  December 4, 2015). Suppose you have been hired by the natural resources defense council to investigate bottled water consumption in st. Paul.  You plan to select a sample of st Paulities to estimate the proportion who drink bottled water more than once a week.  Assume the population proportion of st Paulities who drink bottled water more than once a week is 0.32, the same as the overall proportion of Americans who drink bottled water more than once a week.  Use the z table

D. Based upon a smaller sample of only 190 st. Paulities,  what is the probability that the sample proportion will be within 0.08 of the population proportion.  (To 4 decimal).

Probability  = ?

E. As measured by the increase in probability,  how much do you gain in precise by taking the larger sample in parts a and b rather than the smaller sample in parts c and d?

Reduced by      ?

Have gain in precision by increasing the sample.

A. Duppose you select a sample of 540 st. Paulities.  Show the sampling distribution pf p (to 4 decimals).

E(p) = .32

Op= ?    I got 0.0203 but its wrong

Thank you

 

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