t =
multiply both sides by 6rt
6crt = 1 ( divide both sides by 6ct to obtain r )
t =
Answer:
t is less than or equal to 4
Step-by-step explanation:
Answer:
n=1705
Step-by-step explanation:
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
Assuming the X follows a normal distribution
And the distribution for is:
We know that the margin of error for a confidence interval is given by:
(1)
The next step would be find the value of , and
Using the normal standard table, excel or a calculator we see that:
If we solve for n from formula (1) we got:
And we have everything to replace into the formula:
And if we round up the answer we see that the value of n to ensure the margin of error required mm is n=1705.
Answer:
Y=4/5 or 0.8
Step-by-step explanation:
8y-4=3y
8y-3y=4
5y=4