[ Please help ] The graph below plots a function f(x).

Mathematics

1 answer:

Luden [163]4 years ago

4 0

25 (units of distance/units of time)

The first two seconds are determined between points (0,50) and (2,100). Given these points, finding the slope between them gives you the average rate of change:

$\frac{Δy}{Δx} = \frac{(100 - 50)}{(2 - 0)} = \frac{50}{2} = 25$

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Think about a population proportion that you may be interested in and propose a confidence interval problem for this parameter.

o-na [289]

Answer: The confidence interval would be (0.2928,0.3672).

Step-by-step explanation:

Since we have given that

Total number of vehicles = 432

Number of SUVs sold = 142

So, it becomes,

$\hat{p}=\dfrac{x}{n}=\dfrac{142}{432}=0.33$

At 90% confidence interval,

z = 1.645

So, the confidence interval would be

$\hat{p}\pm z\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.33\pm 1.645\sqrt{\dfrac{0.33\times 0.67}{432}}\\\\=0.33\pm 0.0372\\\\=(0.33-0.0372,0.33+0.0372)\\\\=(0.2928,0.3672)$