Step-by-step explanation:
π×4×4×8/3
π×16×8/3
128/3×π
128/3π cm²
What is the value of x? O 6 O 62 O 12 O 122
2 answers:
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Answer:
The minimum sample size that should be taken is 62.
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.
If we want to be 90% confident that the sample mean is within 1 word per minute of the true population mean, what is the minimum sample size that should be taken
This is n when . So
The minimum sample size that should be taken is 62.