Answer:
The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).
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 zscore that has a pvalue of .
For this problem, we have that:
95% confidence level
So , z is the value of Z that has a pvalue of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).
Answer:
10
Step-by-step explanation:
10/10 For sure. I see that musical ly logo. Good times
Either 700000 or seven hundred thousand
Answer:
but dude what to answer............
Answer:
y intercept is 18
Step-by-step explanation:
It is given that
Monthly rent for phone service = $18
charges for each long distance minute = $ 0.07
Let us assume number of minutes used = x
also let us represent total cost by y
So the total cost = ( charges per minute )(number of minutes) + monthly rent
now we compare this equation with y=mx+b
where m is the slope and b is y intercept
so we have b= 18
hence y intercept is 18