A market research firm conducts telephone surveys with a 44% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions?

So, the probability is P=0.9953.

Step-by-step explanation:

We know  that a market research firm conducts telephone surveys with a 44% historical response rate.

We get that:

We calculate the standar deviation:

So, we get

We use a probability table to calculate it

So, the probability is P=0.9953.