A market research firm knows from historical data that telephone surveys have a 36% response rate. In a random sample of 280 telephone numbers, what is the probability that the response rate will be between 33.5% and 39%?

0.6604

Step-by-step explanation:

Given that a market  research firm knows from historical data that telephone surveys have a 36% response rate.

Sample size of random sample = 280

We know for samples randomly drawn of large size sample proportion follows a normal distribution with mean= sample proportin and std error

=

Substitute p = 0.36 and q = 1-0.36= 0.64

p follows N with mean = 0.36 and std dev =

Using normal distribution values we can find\

c. 6tan80

step-by-step explanation: