4 years ago

#7 HELP IVE FALLEN AND I️ CANT GET UP!!! 0.1(x+20)+0.1x=3 what’s the solution set??

Mathematics

2 answers:

Fudgin [204]4 years ago

7 0

x=5 i'm not sure but i hope this helps you

ArbitrLikvidat [17]4 years ago

4 0

The person above is correct. The solution is 5 :)

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Ahat [919]

Answer:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

Step-by-step explanation:

Information provided

n=100 represent the random sample taken

X=21 represent the number of bags overfilled

$\hat p=\frac{21}{100}=0.21$ estimated proportion of overfilled bags

$p_o=0.15$ is the value that we want to test

z would represent the statistic

Hypothesis

We need to conduct a hypothesis in order to test if the true proportion of overfilled bags is higher than 0.15.:

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Alternative hypothesis: $p > 0.15$

The statistic for this case is:

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

And replacing the info given we got:

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