It’s just a change of sign. For example y+-1(x+2) or y-x-2 or y-(x+2) all the same thing
Answer:
The mean exam scores in the second section is greater than the mean exam scores in the first section
Step-by-step explanation:
Here, we are interested in making a conclusion.
Mathematically;
z-score = (score - mean)/SD
so basically, what determines the sign of the z-score is dependent entirely on the mean.
If the mean is larger than the score, we will have a negative z-score. If the mean is smaller than the score, then will have a positive z-score
So basically what drives the sign is the mean value since the scores are the same for both students in this case, irrespective of the standard deviation in both classes.
So, for the first girl with a positive z-score, we can conclude that her score is larger than the mean; while for the second girl with a negative z-score, her score is smaller to the mean.
Thus, what we conclude here is that the mean score of the second section with the professor is greater than the mean score of the first section with the professor.
Answer:
you need to explain more of what you are wanting me to do befor I can answer this question
Since 1 pizza has 8 slices than 3 pizzas will have 24 slices
The formula to find how many different ways are there to choose a subgroup of r things from a group of n things is
Here, you have 7 trophies and you want to choose 4 of them, so you have
So there are 840 ways to choose your 4 trophies out of the 7 you have.