C
Explain
Second line isn’t going strong
Answer:
The 95% confidence interval for μ for the given situation is between 87.49 and 94.51.
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
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 91 - 3.51 = 87.49
The upper end of the interval is the sample mean added to M. So it is 91 + 3.51 = 94.51
The 95% confidence interval for μ for the given situation is between 87.49 and 94.51.
Answer:range is -2
Step-by-step explanation:
Answer:
2. 113.0 yd²
Step-by-step explanation:
Circumference Formula: C = 2πr
Area of a Circle Formula: A = πr²
Since we are given circumference, simply plug it in to find radius <em>r</em>:
Step 1: Find <em>r</em>
37.68 = 2πr
r = 37.68/2π
r = 5.99696
Step 2: Find area
A = π(5.99696)²
A = 112.983
-35-85=-120
-120+5=-115
-115-25=-140