<img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba%7D%7B5%7D" id="TexFormula1" title="\frac{a}{5}" alt="\frac{a}{5}" align="absmiddle

Part A: $1920 because if you change 20%to .2 then .2*1600= 320 and 320+1600=1920
Part B: $320 because 1600/5=320 that is after taxes, before taxes it is $384 because 1920/5=384 you divided it by 5 because it is 1/5, so you divide it by 5 and then multiply it by 1 because 1/5=y/1600 so find y which is what he out in the savings account

4 0

3 years ago

To pass the time on his travels, Ibn Battuta decides to run a test to see if the mean caravan size passing through a certain out

Gemiola [76]

Answer:

C. He should run a T-test, and approximating it with a normal distribution would be inappropriate.

Step-by-step explanation:

We are told that the standard deviation is unknown.

Now in statistics, when we know the standard deviation, then we use a Z-test but when we don't know the standard deviation, then we will use a t-test.

Now, the t-test assumes a normal distribution for difference in mean of samples but it doesn't assume so for population.

Thus, we will run a t-test and doesn't need to approximate with a normal distribution.

8 0

3 years ago