Answer:
$91.75
Step-by-step explanation:
babysitting = B
Farmers Market = F
9.5B + 12.25F = Total money earned
9.5 (4.5) + 12.25 (4) = $91.75
Answer:
432.7 mens ate there in class
X = 17
5 = x - 12
12 + 5 = x
17 = x
Answer:
so u multiply negative four times nagative 1.5
Answer:
The 95% confidence interval for the proportion of students who get coaching on the SAT is (0.1232, 0.147).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the z-score that has a p-value of
.
427 had paid for coaching courses and the remaining 2733 had not.
This means that 
95% confidence level
So
, z is the value of Z that has a p-value of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The 95% confidence interval for the proportion of students who get coaching on the SAT is (0.1232, 0.147).