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? Skewed to the left Skewed to the right Unimodal and symmetric ONonsymmetric 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.)

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? Skewed to the left Skewed to the right Unimodal and symmetric ONonsymmetric 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.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 6E

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