If it is 699.00 on e bay and the markup is 30 percent then you would have to kind of subtract
Answer:
A. Use the two-sample t-methods when a sample was taken from each of two populations (i.e. two groups being compared) and the population standard deviations are not known.
Step-by-step explanation:
T-distribution:
When the population standard deviation is not known, the t-distribution is used.
If a sample was taken from one population, we use the one-sample method, while if there is a comparison of two populations, the two-sample method is used, and thus, the correct answer is given by option A.
Answer:
Part a: 4 minutes
Part b:
lap
Part c: 84 minutes or 1 hr and 24 minutes
Step-by-step explanation:
<em><u>Part a:</u></em>
Ok so you got part a right, it's 4 minutes.
<em><u>Part b:</u></em>
you would do
that will give you
.
So it's a quarter of a lap per minute.
<em><u>Part c:</u></em>
For this one we know that it takes her 4 minutes just to complete one lap, and if they're doing 21 laps that means we'll multiply 21 and 4. That gives us 84 minutes, or 1 hr and 24 min.
From the information in the problem, the ratio of defective cameras to cameras shipped is
![\frac{4}{800}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B800%7D%20)
. Reducing this ratio, we get the simplified form of
![\frac{4}{800}\div \frac{4}{4}= \frac{1}{200}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B800%7D%5Cdiv%20%5Cfrac%7B4%7D%7B4%7D%3D%20%5Cfrac%7B1%7D%7B200%7D%20)
which, incidentally, gives us our answer. We have
1 defective camera for every 200 cameras shipped.