A market surveyor wishes to know how many energy drinks teenagers drink each week. They want to construct a 98% confidence interval with an error of no more than 0.08. A consultant has informed them that a previous study found the mean to be 5.9 energy drinks per week and found the variance to be 1.21. What is the minimum sample size required to create the specified confidence interval

The minimum sample size required to create the specified confidence interval is 1024.

Step-by-step explanation:

We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so

Now, find the margin of error M as such

In which is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when .

The minimum sample size required to create the specified confidence interval is 1024.

the correct answer is 828.07

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.