I think the answer is B. Hope you get it!
Here's how you do it. You'll use this forever,
so you should memorize it:
A fraction is just a short way to write a division.
Whenever you see a fraction, it means
(the top number) divided by (the bottom number).
When you actually do the division, the quotient you get
is the decimal that's equal to the fraction.
To find the decimal equivalent of a fraction, divide
the top number by the bottom number.
(6) divided by (20) = 0.3 .
Answer:
3
Step-by-step explanation:
Add up the exponents of the variables
5xyz = 1+1+1 = 3
The degree is 3
Answer:
The minimum sample size needed is 
. If n is a decimal number, it is rounded up to the next integer. 
is the standard deviation of the population.
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 Z-table as such z has a p-value of 
.
That is z with a pvalue of 
, so Z = 1.645.
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 large a sample must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?
A sample of n is needed, and n is found when M = 4. So
The minimum sample size needed is . If n is a decimal number, it is rounded up to the next integer. is the standard deviation of the population.
