What we know:
(Also, 
)
What we need to solve:
(This is equal to 
)
How you have to subtract 
with 
to get:
Thus, the answer would be:
3/4 is as simple as it gets 5/10- 1/2
Answer:
We can be 95% confident that consumers spend between $4.04 and $15.96 less at Store A than the consumers spend at Store B.
Step-by-step explanation:
Confidence Intervals give an estimate as range of values for a statistic concerned at a <em>confidence level</em>.
In this case the statistic is the mean difference between Store A and Store B purchase amounts and the confidence level is 95%.
Confidence Interval can be calculated using M±ME where
- M is the sample mean difference between Store A and Store B purchase amounts
- ME is the margin of error from the mean
We need the picture to answer so if you could take a picture and put it on the question
2x+13=3x-2 can be the equation (I believe)
