preachersgirl5
20.09.2019 •
Mathematics
Consider a population having a standard deviation equal to 10.05. we wish to estimate the mean of this population. (a) how large a random sample is needed to construct a 95 percent confidence interval for the mean of this population with a margin of error equal to 1? (round your answer to the next whole number.) the random sample is units. (b) suppose that we now take a random sample of the size we have determined in part a. if we obtain a sample mean equal to 252, calculate the 95 percent confidence interval for the population mean. what is the interval’s margin of error?
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Ответ:
D. $393.00
Step-by-step explanation:
We have to sum the three distances to get the perimeter.
P= 34 ft + 67 ft+ 30 ft
P = 131 ft
And each foot of material cost $3.00
we get the cost with the distance and de cost of the material:
Cost = 131 ft * 3.00 $ per ft = $393.00
Sarah needs $393.00 to fence her backyard garden