Elizabeth brought a box of donuts to share. There are two-dozen (24) donuts in the box, all identical in size, shape, and color.
1 answer:
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Answer:
Step-by-step explanation:
We are to determine which of these expressions are equivalent to:
- If we factor out -2
- If we factor out -7
Therefore, the two equivalent expressions are:
Answer:
The sample size required is at least 171
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.
What sample size is required?
A samle size of at least n is required, in which n is found when
So
Rouding up
The sample size required is at least 171