A. What is the probability that 4 are smartphone-dependent? The probability is ___. B. What is the probability that at least 4 are smartphone-dependent? The probability is___. C. What is the probability that at most 2 are smartphone-dependent? The probability is ___.
Smartphone adoption among younger adults has increased substantially and mobile access to the Internet is pervasive. Fifteen percent of young adults in one study are "smartphone-dependent," meaning that they do not have home broadband service and have limited options for going online other than their mobile device. Consider a sample of 10 young adults selected.
A. What is the
The probability is ___.
B. What is the probability that at least 4 are smartphone-dependent?
The probability is___.
C. What is the probability that at most 2 are smartphone-dependent?
The probability is ___.
D. If you selected a sample in a particular geographic 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 15%?
Select the correct choice below and fill in the answer box to complete your choice.
A. Since the probability of a sample in which none of the 10 respondents are smartphone-dependent is ___, there is no reason to question the given percentage because this probability indicates that such a sample is reasonable.
B. Since the probability of a sample in which none of the 10 respondents are smartphone-dependent is ___, there is reason to question the given percentage because this probability indicates that such a sample is not reasonable.
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