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 420 investors from their customers. Suppose that the true proportion of smartphone users is 40​%. Complete parts​ a) through​ c) below. ​a) What would the managers expect the shape of the sampling distribution for the sample proportion to​ be?   Nonsymmetric   Skewed to the right   Skewed to the left   Unimodal and symmetric Part 2 ​b) What would be the mean of this sampling​ distribution?   Mean=? ​(Round to two decimal places as​ needed.) Part 3 ​c) What would be the standard deviation of the sampling​ distribution?   Standard Deviation=?

MATLAB: An Introduction with Applications
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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 420 investors from their customers. Suppose that the true proportion of smartphone users is 40​%. Complete parts​ a) through​ c) below.

​a) What would the managers expect the shape of the sampling distribution for the sample proportion to​ be?
 
Nonsymmetric
 
Skewed to the right
 
Skewed to the left
 
Unimodal and symmetric
Part 2
​b) What would be the mean of this sampling​ distribution?
 
Mean=?
​(Round to two decimal places as​ needed.)
Part 3
​c) What would be the standard deviation of the sampling​ distribution?
 
Standard Deviation=?
​(Round to three decimal places as​ needed.)
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