1. What is the period of the sinusoidal function? Please help thank you
1 answer:
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(-4)^-3 = 
-4^-3 =
Basically in this situation there is no difference whether parenthesis are used or not.
-4^-3 =
Basically in this situation there is no difference whether parenthesis are used or not.
Answer:
Step-by-step explanation:
Given that a researcher is trying to decide how many people to survey.
We have confidence intervals are intervals with middle value as the mean and on either side margin of error.
Confidence interval = Mean ± Margin of error
Thus confidence interval width depends on margin of error.
Margin of error =
Thus for the same confidence level and std deviation we find margin of error is inversely proportional to square root of sample size.
Hence for small n we get wide intervals.
So if sample size = 300, the researcher will get wider confidence interval