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Romashka [77]
3 years ago
15

The system of equations is inconsistent.

Mathematics
1 answer:
Artist 52 [7]3 years ago
8 0
There are an infinite numbers of solutions. The only information given in the second equation is the y-intercept of y =5 where the second line crosses the y-axis. And there are an infinite number of lines crossing that point and also intersecting the first linear equation.
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A package of 3 pairs of insulated costs ​$15.57. What is the unit price of the pairs of ​?
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-3 pairs cost $15.57

15.57 divided by 3

$5.19 per pair unit rate

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In a recent poll of 3011 adults, 73% said that they use the Internet. A newspaper claims that more than 75% of adults use the In
pishuonlain [190]

Answer:

z=\frac{0.73 -0.75}{\sqrt{\frac{0.75(1-0.75)}{3011}}}=-2.534  

p_v =P(z  

So the p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis.

So then the correct option would be:

0.0057; reject the null hypothesis

Step-by-step explanation:

Data given and notation

n=3011 represent the random sample taken

\hat p=0.73 estimated proportion of adults who use internet

p_o=0.75 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the proportion is more than 0.75:  

Null hypothesis:p\geq 0.75  

Alternative hypothesis:p < 0.75  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

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

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.73 -0.75}{\sqrt{\frac{0.75(1-0.75)}{3011}}}=-2.534  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a left tailed test the p value would be:  

p_v =P(z  

So the p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis.

So then the correct option would be:

0.0057; reject the null hypothesis

7 0
3 years ago
I NEED HELP ASAP! I just need help on these 2 I don't understand!
jarptica [38.1K]
1 is C <span>4 × 10^3 ft^3
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