MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:An investment website can tell what devices are used to access their site. The site managers wonder whether they should enhance the facilities for trading via
smartphones so they want to estimate the proportion of users who access the site that way. They draw a random sample of 359 investors from their customers.
Suppose that the true proportion of smartphone users is 27%. Complete parts a) through c) below.
a) What would the managers expect the shape of the sampling distribution for the sample proportion to be?
O Skewed to the left
Skewed to the right
Unimodal and symmetric
O Nonsymmetric
b) What would be the mean of this sampling distribution?
Mean =
(Round to two decimal places as needed.)
c) What would be the standard deviation of the sampling distribution?
Standard Deviation = (Round to three decimal places as needed.)
04
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