Answer:
1.97
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, is the hypothesis tested(null hypothesis),
is the standard deviation and n is the size of the sample.
In this problem, we have that:
So
Given the comopound inequality:
Let's graph the compound inequality.
Here x is greater than -1 but less than or equal to 7.
To graph the inequality, we have:
[tex]-1Since x is greater than -1, plot an open dot on the point -1.Also, x is less than or greater than 7, plot a closed dot on the point 7.
Then draw a straight line connecting both points.
Hence, we have the graph below:
