market research firm conducts telephone surveys with a historical response rate. What is the probability that in a new sample of telephone numbers, at least individuals will cooperate and respond to the questions

0.8461

Step-by-step explanation:

The question didn't state any value, so I assumed some of my own.

You can check your notes, and change the values to that of your own, it's the same method.

Given that

The market research firm conducts survey with 40% historical response rate.

The total number of sample is used is 400

The total number of individuals expected to cooperate is 150

What is the probability that the sample proportion would be 150/400 or 0.375..

See attachment for calculation.

a

step-by-step explanation: