Which of the following could be the system of nonlinear inequalities graphed below? ASAP !!

The CEO of a large electric utility company claims that 80 percent of his 1,000,000 customers are very satisfied with the servic

Oksana_A [137]

Answer:

Conclusion: The proportion of customers satisfied with the service they receive from the large electric utility company is different from 80%, the claim made by the CEO.

Step-by-step explanation:

To test the claim made by the CEO of a large electric utility company the newspaper must conduct a hypothesis test for one proportion.

Assumption:

The significance level (α) of the test can be assumed to be 5%.

Hypothesis:

$H_{0}:$ The proportion of customers satisfied with the service they receive is 0.80, i.e. $p=0.80$

$H_{a}:$ The proportion of customers satisfied with the service they receive is different from 0.80, i.e. $p\neq 0.80$

Decision Rule:

If the p-value of the test is less than the significance level (α) then the null hypothesis may be rejected. But if the p-value is more than the significance level (α) then we cannot reject the null hypothesis.

Test Statistics:

As the sample size is large, i.e.n = 100 > 30, then according to the central limit theorem sampling distribution of sample proportion will follow the normal distribution.

The test statistic used is:

$z=\frac{\hat p-p}{\frac{\sqrt{p(1-p)}} {n} }$

Given:

The p-value of the hypothesis test is computed to be 0.894.

That is:

$p-value=0.894>\alpha =0.05$

This implies that we fail to reject the null hypothesis at 5% level of significance.

Conclusion:

The null hypothesis was failed to be rejected at 5% level of significance.

Thus, concluding that the proportion of customers satisfied with the service they receive from the large electric utility company is different from 80%, the claim made by the CEO.

4 0

3 years ago

Please help me I need someone smart

svp [43]

Photomath will give u the graph, max and min, vertex, and will tell u if negative or positive if u take a picture of the equation

6 0

3 years ago

Let m be the side length of the fourth smallest possible square with integer value of its area, and let n be the sum of all prim

Natali [406]

Answer:

510

Step-by-step explanation:

It's assumed 0 is not an integer.

M is obviously 2. The area of a square is the square of its side length. If this area must be an integer, then it must be the fourth integer, which is 4. The side length, $M=\sqrt{4} = 2$

A prime number is a positive integer which can be divided exactly by only itself and 1. In fact, it has only those two factors. The last statement excludes 1 as a prime number. Hence, the prime numbers less than 10 are 2, 3, 5 and 7. Their sum is $N=2+3+5+7=17$ .