Answer:
Step-by-step explanation:
Let X be the length of time between billing dates and checks received and deposited for non-delinquent accounts of an oil company’s monthly credit card customers
X has mean 13.5 and sigma 3 days
Sample size = n =36, x bar = 13
![H_0: x bar = 13.5\\H_a: x bar](https://tex.z-dn.net/?f=H_0%3A%20x%20bar%20%3D%2013.5%5C%5CH_a%3A%20x%20bar%20%3C13.5)
(One tailed test at 0.025 sign. level)
Mean diff = -0.5
Since sigma is known z test can be used
Std error =![\frac{\sigma}{\sqrt{n} } =0.5](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%20%7D%20%3D0.5)
Z statistic = -0.5/SE= -0.1
p value = 0.920
p>0.025 hence accept null hypothesis.
My conclusion is there is no statistical evidence that lock box reduced the mean time.
oh, sorry my answer is wrong :) you can follow the other comment.
C and the vertex is V (6,18)
Answer:
y = - 2
Step-by-step explanation:
The equation of a horizontal line parallel to the x- axis is
y = c
where c is the value of the y- coordinates the line passes through.
The points (2, - 2) and (0, - 2) have the same y- coordinate and therefore lie on a horizontal line with equation
y = - 2
The correct answer is B. Supplementary
That is the basic definition of what supplementary angles are and can be found in any textbook.