Answer:
If anders flips one coin, he has a 1/2 chance of heads.
if he flips two, he has to get to heads, which the chances are 1/2 and 1/2
So multiply 1/2*1/2
you get 1/4
Answer:
Step-by-step explanation:
For this case we have the following data:
represent the random sample 1 selected
represent the proportion of success for the sample 1 selected
represent the random sample 2 selected
represent the proportion of success for the sample 2 selected
We know for this case that we can use the normal approximation since for both cases we have:
We have the randomization condition and we assume that the two samples are <10% of the entire population size.
So then we can use the following distribution for the proportions:
For this case we want to find the distribution for the difference of these two proportions and we have this:
So then the dtandard deviation would be given by:
You haven't posted the answer choices, but Trey got the wrong answer.
The denominators must be the same in order to add the fractions. In this case, the denominators 15 and 10 are different. We cannot add in this current state.
Adding the denominators is a common mistake which you should practice to avoid.
Answer:
y= -2
y=-2
Step-by-step explanation:
Subtract 87 from 700
700 - 87 = 613
You need 613 more points