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Taya2010 [7]
3 years ago
13

If an item is marked up 15% and the new cost is 155.25 what was the original price

Mathematics
1 answer:
Dmitry [639]3 years ago
4 0
(1-0.15)=0.85
0.85 (155.25)=131.962
    estimated answer
131.962 is about $132.00
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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}}}

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refer the z table for p value

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

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snow_tiger [21]

Answer:

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