ericlawton
29.07.2019 •
History
The soviet union economy of the 1980s would best be classified as:
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Ответ:
C. Narrower for 90% confidence than for 95% confidence.
Step-by-step explanation:
A limits of a confidence interval are u-E and u+E, where u is the mean and E is the margin of error. The bigger the E the wider the interval is going to be. There is a formula for calculating E for a mean and for a proportion. They are both shown in the picture
A. Is false because the z for a 99% confidence level is greater than the one for a 95% confidence level, so E is going to be larger and the interval is going to be wider.
B. Is false because E decreases as n increases. So the E for 100 is going to be smaller than E for 50 and the interval for 100 is going to be narrower than the one for 50.
D. False because the if we calculate E for p = 0.5 it is going to be bigger than the one for p = 0.20.