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julia-pushkina [17]
3 years ago
10

How many centre meters in 1.5 kilometres

Mathematics
1 answer:
Elan Coil [88]3 years ago
6 0
150000 centimeters. Hope this helps. :)
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According to a study by the American Pet Food Dealers association, 63 percent of U.S. households own pets. A report is being pre
Nastasia [14]

Answer

z=\frac{0.7 -0.63}{\sqrt{\frac{0.63(1-0.63)}{300}}}=2.511  

p_v =2*P(z>2.511)=0.012  

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, and we can said that at 5% of significance the proportion of households with pets is different from 0.63. This data disagree deom the Pet food association

Step-by-step explanation:

Data given and notation

n=300 represent the random sample taken

X=210 represent the households with pets

\hat p=\frac{210}{300}=0.7 estimated proportion of households with pets

p_o=0.63 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_vrepresent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that true proportion is 0.63:  

Null hypothesis:p=0.63  

Alternative hypothesis:p \neq 0.63  

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{0.7 -0.63}{\sqrt{\frac{0.63(1-0.63)}{300}}}=2.511  

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 bilateral test the p value would be:  

p_v =2*P(z>2.511)=0.012  

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, and we can said that at 5% of significance the proportion of households with pets is different from 0.63. This data disagree deom the Pet food association

7 0
3 years ago
What is 49 times 69 equal to?
garri49 [273]

Answer:

3381 is the answer

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2 years ago
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Elementry problem<br><br> dwadawdawd
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Answer:

x=4

Step-by-step explanation:

area of rectangle= length x width

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4

9x4=36

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. QUIZ You answered 14 questions correctly on a 15-question quiz. What percent did you receive on the quiz? Round to the nearest
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Step-by-step explanation:

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3 years ago
Find the value of x in The parallelogram.
aksik [14]

Answer:

122 degrees

Step-by-step explanation:

A parallelogram has 360 degrees in total

360 - (58 + 58) = 244

244/2 = 122

I hope this helped you!

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