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lana66690 [7]
2 years ago
11

Please help me find the answe asap

Mathematics
1 answer:
Andreyy892 years ago
4 0

Answer:

B

Step-by-step explanation:

the mean is calculated as

mean = \frac{sum}{count}

this year's mean = \frac{7+3.3+2}{3} = \frac{12.3}{3} = 4.1

last year's mean = \frac{5.3+1.6+2.4}{3} = \frac{9.3}{3} = 3.1

difference = 4.1 - 3.1 = 1

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Answer:

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The p value for this case would be:

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Step-by-step explanation:

Information given

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Hypothesis to test

We want to test if the true proportion is equatl to 0.39 or not, the system of hypothesis are.:  

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The statistic is given by:

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Replacing the info we got:

z=\frac{0.36 -0.39}{\sqrt{\frac{0.39(1-0.39)}{100}}}=-0.615  

The p value for this case would be:

p_v =2*P(z  

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is not different from 0.39

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Step-by-step explanation:

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