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aksik [14]
3 years ago
12

Five less than the product of a number and-8 is -77

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
5 0

five less than the product of a number and-8 is -77

-8n -5 = -77

add 5 to each side

-8n = -72

divide by -8

n =9

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Answer:

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Based on this the correct system of hypothesis are:

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Step-by-step explanation:

We have the following info given from the problem:

n= 800 the random sample of voters selected from the town

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p_o = 0.30 represent the value desired to test.

A political strategist wants to test the claim that the percentage of residents who favor construction is more than  30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: p \leq 0.3

Alternative hypothesis p >0.3

And in order to test this hypothesis we can use a one sample z test for a population proportion and the statistic would be given by:

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

And with the data given we have:

z=\frac{0.34 -0.3}{\sqrt{\frac{0.3(1-0.3)}{800}}}=2.469  

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3 years ago
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svetlana [45]
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7 0
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3 years ago
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