Answer:
The critical values of F at 95% confidence are 0.359 and 2.788.
Step-by-step explanation:
We are given that a sample of 21 days of sales at Store A and a sample of 16 days of sales at Store B indicated the following:
Store A Store B
nA = 21 nB = 16
SA = 28.284 SB = 20
And we are interested in determining whether or not the variances of the sales at two small grocery stores are equal.
AS we know that when we are interested in variances of two samples, we use F-test for doing hypothesis testing.
The test statistics for F-test is = ~
where, and are sample standard deviations.
Now, the critical values of F at 2.5% (because two-tailed test) level of significance from F-table at degrees of freedom (21 - 1, 16 - 1) = (20, 15) are given as;
2.788 for right-part and 0.359 for the left-part.
Answer:
12.02 inches
Step-by-step explanation:
recall, volume of a cylinder is given by
V = πr²h
where r is the radius of the cylinder and h = the height
hence
9080 = π x r² x 20
r² = 9080 ÷ 20π = 144.513
r = √144.513 = 12.02 inches
Answer: x=-2500
Happy to help! :) Brainliest plz?
Answer:
L = 12
Step-by-step explanation:
I didn't really know how to do it I just looked it up lol