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Serga [27]
3 years ago
14

How do you do this problem and please show the work? 3/4 (4-x)

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
6 0
(3/4*4)+(3/4*-x)= (3)+(-3/4x) = -3/4x+ 3
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The heights in inches of orangutans Are normally distributed with a population standard deviation of 3" and an unknown populatio
CaHeK987 [17]

Answer: The 95% confidence interval is approximately (55.57, 58.43)

======================================================

Explanation:

At 95% confidence, the z critical value is about z = 1.960 which you find using a table or a calculator.

The sample size is n = 17

The sample mean is xbar = 57

The population standard deviation is sigma = 3

The lower bound of the confidence interval is

L = xbar - z*sigma/sqrt(n)

L = 57 - 1.960*3/sqrt(17)

L = 55.5738905247863

L = 55.57

The upper bound is

U = xbar + z*sigma/sqrt(n)

U = 57 + 1.960*3/sqrt(17)

U = 58.4261094752137

U = 58.43

Therefore the confidence interval (L, U) turns into (55.57, 58.43) which is approximate.

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(3x^2 + 4x^2) + (2x) + (2 + 5)

7x^2 + 2x + 7

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