According to a food and drug administration (fda) study, a cup of coffee contains an average of 115 mg of caffeine, with the amount per cup ranging from 60-180 mg. suppose u want to repeat the fda experiment in order to obtain an estimate of the mean caffeine content in a cup of coffee correct to withing 5 mg with 95% confidence. how many cups of coffee would have be included in your sample?

139

Step-by-step explanation:

As per given , we have

The amount of caffeine per cup is ranging from 60-180 mg.

Range = Maximum - Minimum = 180 -60 =12

According to Range -rule ,

Standard deviation =

Formula for sample size : , where z* is critical z value and E is margin of error.

By z-table , the critical z-value for 95% confidence interval = 1.96

E= 5

Put all values in formula , we get

Hence, 139 cups of coffee would have be included in the sample.

d. 9

step-by-step explanation:

in the table given in the picture, x is the input of the function and f(x) is the output on the given input. in the given table, it can be read as the value of function at -3 is it's respective value of f(x) which is -9.

as we have to find the value of f(3), we will see that what is the value of output on input 3. we can see in the table that the output value at x=3 is 9.

so, option d is the correct answer ..

no solution

step-by-step explanation:

there is not enough information in the problem to solve.