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timofeeve [1]
3 years ago
15

someone came into my shop and stole $100 from the register without my knowledge. The person came back with the same $100 five mi

nutes later and he bought $70 in items and I gave him back $30 change. How much money did I loose?
Mathematics
1 answer:
leonid [27]3 years ago
6 0
$30, because basically, it's -100, +100, -30.
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Suppose that we are testing a coin to see if it is fair, so our hypotheses are: H0: p = 0.5 vs Ha: p ≠ 0.5. In each of (a) and (
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Answer:

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a. We get 56 heads out of 100 tosses.

We will use one sample proportion test  

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\widehat{p}=\frac{56}{100}

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Formula of test statistic =\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}

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refer the z table for p value

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a.  We get 560 heads out of 1000 tosses.

We will use one sample proportion test  

x = 560

n = 1000

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{560}{1000}

\widehat{p}=0.56

Formula of test statistic =\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}

                                       =\frac{0.56-0.5}{\sqrt{\frac{0.5(1-0.5)}{1000}}}

                                       =3.794

refer the z table for p value

p value = .000148

p value of part B is less than Part A because part B have 10 times the number the tosses.

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Answer:

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