6 units
the answer needs more characters
Answer:
4??????????????
Step-by-step explanation:
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Solution:
We are given:
μ=60
σ=15.9
n=40
![\bar{x}=63](https://tex.z-dn.net/?f=%20%5Cbar%7Bx%7D%3D63%20)
![z=\frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}}}](https://tex.z-dn.net/?f=%20z%3D%5Cfrac%7B%5Cbar%7Bx%7D-%5Cmu%7D%7B%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D%20)
![=\frac{63-60}{\frac{15.9}{\sqrt{40}}}](https://tex.z-dn.net/?f=%20%3D%5Cfrac%7B63-60%7D%7B%5Cfrac%7B15.9%7D%7B%5Csqrt%7B40%7D%7D%7D%20)
![=\frac{3}{2.5140}](https://tex.z-dn.net/?f=%20%3D%5Cfrac%7B3%7D%7B2.5140%7D%20)
![=1.19](https://tex.z-dn.net/?f=%20%3D1.19%20)
Therefore, the z-statistic is 1.19
<h3>
Answer: Choice B</h3>
Doug borrowed $2 from his friend every day from Monday through Friday. How much money does Doug owe in all?
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Explanation:
The notation 5(-2) is the same as saying "5 times negative 2"
The negative represents the amount of debt that Doug goes into when borrowing that $2. When borrowing the same amount over the course of 5 days, he'll be in debt a total of 10 dollars. So we'd write -10 to represent this.
You could also write it out the longer way
-2 + (-2) + (-2) + (-2) + (-2) = -10
There are five copies of "-2" being added up to arrive at -10
Though it's much simpler to say
5(-2) = -10