elijah1090
08.04.2020 •
Mathematics
A researcher is estimating the mean income of residents in a large city. She collects a random sample of 25 people. The resulting 95% confidence interval is ($26700,$35400). Which of the following conclusions are valid? (i) We are 95% confident that the mean income for all residents of this city is between $26700 and $35400. (ii) 95% of the residents of this city have an income between $26700 and $35400. (iii) No conclusion can be drawn.
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Ответ:
Length (L): 3w
width (w): w
Perimeter (P) = 2L + 2w
600 = 2(3w) + 2(w)
600 = 6w + 2w
600 = 8w
75 = w
Length (L): 3w = 3(75) = 225
Length=225 feet, width=75 feet