Write an integer to represent each situation: Jillian deposited $47 he received for his birthday
2 answers:
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Answer:
We need to sample at least 1069 parents.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
How many parents do you have to sample?
We need to sample at least n parents.
n is found when . So
Rounding up
We need to sample at least 1069 parents.
In this case you would set it up as
(180 represents the degree of the triangle)
Add up like terms
Subtract 130 to the other side (180-130)
Divide 10 to the other side ( 50/10)
.
Hope this was clear :)
(180 represents the degree of the triangle)
Add up like terms
Subtract 130 to the other side (180-130)
Divide 10 to the other side ( 50/10)
.
Hope this was clear :)