Answer:
The test statistic (z-score) of this one-mean hypothesis test is z=1.823.
Step-by-step explanation:
The null and alternative hypothesis are:

The significance level is 0.05.
The sample size is n=22.
The sample mean is M=157.
The standard deviation is 18.
The z-score can be calculated as:

The test statistic (z-score) of this one-mean hypothesis test is z=1.823.
Answer:
1. 2.2
2. 3.8
3. 9
Step-by-step explanation:
1. Plug in -1.6 for y in the equation.

2. Plug in 0 for y in the equation.

3. Plug in 5.2 for y in the equation

Hope this helped C:
15+70+45=130 :)) that’s how u calculate the perimeter just add them all together.
The answer would be -9
I hope this helps.