According to ORC International, 71% of Internet users connect
their computers to the Internet by normal telephone lines. Assume a
population proportion = 0.71.

a. What is the expected value of the statistic? ____________ (to
2 decimals)

b. What is the standard error of the statistic? ____________
Assume the sample size is 350. (to 3 decimals)

c. What is the probability that a sample proportion from a
simple random sample of 350 Internet users will be within ±0.05 of
the population proportion? _________________

d. What is the probability that a sample proportion from a
simple random sample of 350 Internet users will be 0.75 or
greater?