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Question Help An investment website can tell what devices are used to access the site. The site managers wonder whether they
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Answer #1

b) Probability greater than 0.31 :

= P ( p - p / standard deviation > 0.31 - 0.31 / 0.027 )

= P ( z > 0)

Using the standard normal table

p = 0.500

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Question Help An investment website can tell what devices are used to access the site. The site managers wonder whether they should enhance the facilities for trading via smart phones', so th...
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