Plseas someone know this answer and solution I need it in 10 minutes
1 answer:
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Answer:
B. 97
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 M as such
In which is the standard deviation of the population and n is the size of the sample.
How many students should be sampled to be within 1 drink of the population mean with 95% probability?
This is n when
We know from preliminary studies that the standard deviation is around 5, so
We round up, so the correct answer is:
B. 97