1.) A market research firm conducts telephone surveys with a 43% historical response rate. What is the probability that

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1.) A market research firm conducts telephone surveys with
a 43% historical response rate. What is the probability that
in a new sample of 375 telephone numbers, at
least 150 individuals will cooperate and respond to the
questions? In other words, what is the probability that the sample
proportion will be at least
= 0.4?
2.)
A sample of 5 months of sales data provided the following
information.
(a)
Develop a point estimate of the population mean number of units
sold per month.
(b)
Develop a point estimate of the population standard deviation.
(Round your answer to two decimal places.)