8%
create a fraction of the 4 states out of 50 and multiply by 100% to express as a percentage, that is
× 100% =
= 8%
What is the probability of rolling a prime number of a standard 20-sided die? (1 is not a prime number.) a. 7/20 b. 2/5 c. 9/20
1 answer:
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Answer:
b. The margin of error would decrease.
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, is the standard deviation of the population and n is the size of the sample.
This means that the margin of error is inversely proportional to the size of the sample, which means that if the sample size increases, the margin of error decreases.
In this question, the sample size is increased, leading to a smaller margin of error. So the correct answer is given by option b.