Answer:
The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence interval 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
is the margin of error.
95% confidence interval
So 
, z is the value of Z that has a pvalue of 
, so 
.
We have that:
So
The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.
Answer:
X= 5
Y=0
Z=12
Step-by-step explanation:
Subtract each number from 107
Jus did it as well
Answer:
The answer is 8 purses
Step-by-step explanation:
If we multiply 36 by 8, we get $288. If we multiplied 36 by 8 we must also multiply 10 by 8 because it cost 10 dollars on one purse. So y=10(8)+208, y=288
Answer:
first answer
Step-by-step explanation:
Hello, you know that
So, the quotient we need to estimate is
Thank you
Leg^2+leg^2= hypotenuse^2
18^2+15^2=x^2
324+225=x^2
549=x^2
Find the square root of 549
Your answer is approximately 23.43 inches.
