Select the correct answer from each drop-down menu. Ben is making a chart in which he is listing the masses of different planeta
ry bodies. He plans to write the masses in scientific notation. Convert the values in scientific notation to standard notation. The mass of Ganymede is 1.48E23, or , kilograms. The mass of Pandora is 2.20E17, or , kilograms.
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Answer:
At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.
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.
In this question:
We need a sample size of at least n.
n is found when M = 3. We have that .
Simplifying by 3
Rounding up,
At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.