Answer:
I can't see the picture
Step-by-step explanation:
I can't see it
Answer: -12.81% decrease
Step-by-step explanation:
1678-1463/1463 * 100 = -12.8128
First you had to expanded form.


Finally you can also add by similar to elements.


Final answer: 
Hope this helps!
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-Charlie
Using the z-distribution, it is found that:
- The 95% confidence interval is of -1.38 to 1.38.
- The value of the sample mean difference is of 1.74, which falls outside the 95% confidence interval.
<h3>What is the z-distribution confidence interval?</h3>
The confidence interval is:

In which:
is the difference between the population means.
In this problem, we have a 95% confidence level, hence
, z is the value of Z that has a p-value of
, so the critical value is z = 1.96.
The estimate and the standard error are given by:

Hence the bounds of the interval are given by:


1.74 is outside the interval, hence:
- The 95% confidence interval is of -1.38 to 1.38.
- The value of the sample mean difference is of 1.74, which falls outside the 95% confidence interval.
More can be learned about the z-distribution at brainly.com/question/25890103
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Answer:
12
Step-by-step explanation:
don't ask me to explain