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kakasveta [241]
3 years ago
11

the mean weight of trucks traveling on a particular section of i-475 is not known. a state highway inspector needs an estimate o

f the population mean. he selects and weighs a random sample of 81 trucks and finds the mean weight is 15.8 tons. the population standard deviation is 3.8 tons. what is the 95% confidence interval (upper limit) for the population mean?
SAT
1 answer:
bekas [8.4K]3 years ago
4 0

Answer:

14.7 and 16.9

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Divide both sides of 2 n = 4 by 2:
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The gcd of 4 and 2 is 2, so 4/2 = (2×2)/(2×1) = 2/2×2 = 2:
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