The t-value measures the size of the difference relative to the variation in your sample data. Put another way, T is simply the calculated difference represented in units of standard error. The greater the magnitude of T, the greater the evidence against the null hypothesis.
Answer:
x = 15 inches
Step-by-step explanation:

I think if I had to guess the answer should be D 140
The answer is y = 6
Step-by-step explanation:
The formula of a slope:
We have the points (-5, 6) and (7, 6). Substitute:
The slope m = 0. Therefore it's a horizontal line y = a.
In the given points we have y = 6.