Smartphone adoption among American younger adults has increased substantially and mobile access to the Internet is pervasive. Seventeen percent of young adults, ages 18–29, who own a smartphone are “smartphone-dependent,” meaning that they do not have home broadband service and have limited options for going online other than their mobile device.
Source: Data extracted from www.pewinternet.org/fact-sheet/mobile/.
If a sample of 10 American young adults is selected, what is the probability that
a. 3 are smartphone-dependent?
b. At least 3 are smartphone-dependent?
c. At most 6 are smartphone-dependent?
d. If you selected the sample in a particular geographical area and found that none of the 10 respondents are smartphone-dependent, what conclusions might you reach about whether the percentage of smartphone-dependent young adults in this area was 17%?
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