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RideAnS [48]
2 years ago
15

please answer will give brainliest

Mathematics
1 answer:
lord [1]2 years ago
4 0

Answer:

B. 72 square yards.

Step-by-step explanation:

To find the area, first break it down into two shapes.

The first shape will be a 6 yd by 9 yd rectangle and the second shape will be a 6 yd by 3 yd rectangle.

Find the area of both of these shapes by doing L x W.

Rectangle 1: 6 x 9 = 54 sq yd

Rectangle 2: 6 x 3 = 18 sq yd

Add the two areas to get a total of 72 square yards.

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Step-by-step explanation:

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- We are to investigate the confidence interval of 95% for the population mean of walking times from Fretwell Building to the college of education building.

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- The sample taken was random and independent. We can assume normality of the sample.

- First we compute the critical value for the statistics.

- The z-distribution is a function of two inputs as follows:

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- The confidence interval for the population mean ( u ) of  walking times is given below:

                      [ x^ - z-critical*s / √n  ,   x^ + z-critical*s / √n  ]

Answer:        [ 12.3 - 1.96*3.2 / √24  ,  12.3 + 1.96*3.2 / √24  ]

                   

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