Answer:
The critical value for the 95% confidence interval is z = 1.96.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
So it is z with a pvalue of 
, so z = 1.96.
The critical value for the 95% confidence interval is z = 1.96.
C: Dilation because that is the only one that can increase the size of the figure.
The answer is 10w.
40 divided by 4 is 10. The X and Y cancel out, leaving 4W.
Let's name all the purchases "x"
so
of them were stuffed animals, and out of that
were bears.
to get the results we have to multiply the fraction of bears by the fraction of the stuff animals:
.
and now we simplify:
=
and this is the answer!
The probability that the sample mean is within 2 standard deviations on the high side and 1 standard deviation on the low side is about 0.8186.
