An online survey of 1,000 adults asked, What do you buy from your mobile device? The results indicated that 61%
An online survey of 1,000 adults asked, “What do you buy from your mobile device?” The results indicated that 61% of the females said clothes as compared to 39% of the males. (Data extracted from Ebates.com 2014 Mobile Shopping Survey: Nearly Half of Americans Shop from a Mobile Device, available from bit.ly/1hi6kyX.) The sample sizes of males and females were not provided. Suppose that the results were as shown in the following table:
a. Is there evidence of a significant difference between the pro-portion of males and females who say they buy clothing from their mobile device at the 0.01 level of significance?
b. Determine the p- value in (a) and interpret its meaning.
c. What are your answers to (a) and (b) if 270 males say they buy clothing from their mobile device and 230 did not?
d. Compare the results of (a) through (c) to those of Problem 10.29 (a), (b), and (d) on page 346.
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