Answer:
13 units
Step-by-step explanation:
Points A(-1, -6) and B(-1, 7) both lie on the vertical line x=-1. That means the distance between them is the difference of their y-coordinates:
__
By -Ay = 7 -(-6) = 13
Segment AB is 13 units long.
6 2/3 = 20/3 = 60/9
4 4/9 = 40/9
60/9 - 40/9 = 20/9 = 2 2/9
Multiplying a number by -1 makes the number a negative version of itself. For example, if you were to multiply 3 by -1, you would end up getting a product of -3.
Answer:
A. 36
Step-by-step explanation:
Using the t-distribution, as we have the standard deviation for the sample, we have that the test statistic is given by:
<h3>What are the hypothesis tested?</h3>
At the null hypothesis, it is tested if there is no difference, that is:
At the alternative hypothesis, it is tested if there is a difference, that is:
<h3>What is the test statistic?</h3>
The test statistic is given by:
The parameters are:
is the sample mean.
is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
In this problem, 
is tested at the null hypothesis, and the sample is: 20, -40, -40, 0, 20, - 60, -40, hence:
.
Hence, the test statistic is:
More can be learned about the t-distribution at brainly.com/question/16313918
