Market-share-analysis company Net Applications monitors and reports on Internet browser usage. According to Net Applications, in the summer of 2014, Google’s Chrome browser exceeded a 20% market share for the first time, with a 20.37% share of the browser market (Forbes website, December 15, 2014). For a randomly selected group of 20 Internet browser users, answer the following questions. a. Compute the probability that exactly 8 of the 20 Internet browser users use Chrome as their Internet browser. b. Compute the probability that at least 3 of the 20 Internet browser users use Chrome as their Internet browser. c. F or the sample of 20 Internet browser users, compute the expected number of Chrome users. d. F or the sample of 20 Internet browser users, compute the variance and standard deviation for the number of Chrome users.
39. Market-share-analysis company Net Applications monitors and reports on Internet
browser usage. According to Net Applications, in the summer of 2014, Google’s Chrome
browser exceeded a 20% market share for the first time, with a 20.37% share of the
browser market (Forbes website, December 15, 2014). For a randomly selected group of
20 Internet browser users, answer the following questions.
a. Compute the probability that exactly 8 of the 20 Internet browser users use Chrome
as their Internet browser.
b. Compute the probability that at least 3 of the 20 Internet browser users use Chrome as
their Internet browser.
c. F or the sample of 20 Internet browser users, compute the expected number of Chrome
users.
d. F or the sample of 20 Internet browser users, compute the variance and standard deviation
for the number of Chrome users.
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