Simplify −5x^4(−3x^2+4x−2)
1 answer:
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Answer:
The required sample size increases.
Step-by-step explanation:
The margin of error of a confidence interval is given by:
In which z is related to the confidence level(the higher the confidence level the higher z), is the standard deviation of the population and n is the size of the sample.
In this question:
The confidence level decreases, so z decreases.
For the margin of error to stay the same, the sample size also has to decrease.
The required sample size increases.