15 is 30% of 50
Change the percentage to a decimal by dividing it over 100:
Divide 15 over 0.3:
Change the percentage to a decimal by dividing it over 100:
Divide 15 over 0.3:
What is the solution to 2x2+8x=x2-16? O x=4 O x=-2 O x=2 O x=4
2 answers:
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Answer:
The first student, with 20 measurements, will have the more precise interval due to the larger sample size.
Step-by-step explanation:
Margin of error of a confidence interval:
The margin of error of a confidence interval has the following format:
In which z is related to the confidence level, s to the standard deviation and n to the sample size.
The margin of error is inversely proportional to the square root of the sample size, which means that a larger sample will lead to a lower margin of error, that is, to a more precise interval.
In this question:
One student will use 5 measurements, other 20. The first student, with 20 measurements, will have the more precise interval due to the larger sample size.