(1 point) in 2012, the percentage of cell phone owners who used their cell phone to send or receive text messages was 80%80%. a polling firm contacted a simple random sample of 1000 people chosen from the population of cell phone owners. if pp is the proportion of cell phone owners who used their phone to text, then what was the the probability that p^p^ was between 0.76 and 0.84?

0.9984224

Step-by-step explanation:

Let p is the proportion of cell phone owners who used their phone to text.

Given : The probability of cell phone owners who used their cell phone to send or receive text messages was : p= 0.80

sample size : n= 1000

Then, the the probability that was between 0.76 and 0.84 will  be :-

Hence, the required probability = 0.9984224

  11.4

Step-by-step explanation:

The total is 11.37. Because the number 8.4 only has precision to the nearest tenth, we must round the sum to tenths: 11.4.