Suppose a poll of 700 voters says that 45% of the voters will vote for Candidate A for president. Compute the 99% confidence interval

(0.4016, 0.4984).

Step-by-step explanation:

Let p be the proportion of voters will vote for Candidate A for president.

Formula for confidence interval for proportion:

, here = sample proportion

n= sample size.

z* =two-tailed critical z- value.

As per given, we have

n= 700

= 0.45

Critical two-tailed z-value for 99% confidence interval = 2.576

Then, the required 99% confidence interval for p would be:

Hence, the required confidence interval (0.4016, 0.4984).

a

step-by-step explanation: