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mars1129 [50]
3 years ago
11

Please help me The question is in the picture ;(

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0

Answer:

B. Printer B; 2 more pages per minute

Step-by-step explanation:

70/2 = 35 which is 2 more than 33

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The number of times the value appears in the data set
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Frequency

Step-by-step explanation:

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<span>To find the number of passengers for the next year (2002), take the prior value (7.2 million) and multiply it by 1.09. This will give the predicted value for 2002. In this case, it would be (7,200,000 * 1.09 = 7.848 million). This would show that there is a predicted rise of 0.648 million passengers for the year 2002.</span>
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What goes up a hill with three legs and goes down a hill with four legs?
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A book charges a membership fee of $20 and then $12 for each book purchase.
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4 years ago
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How many business students must be randomly selected to estimate the mean monthly earnings of business students at one college?
marysya [2.9K]

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Approximately 63 business students must be randomly selected to estimate the mean monthly earnings of business students at one college

Step-by-step explanation:

confidence interval = 95%

Standard deviation (\sigma )  = 569

\alpha = 1 - 0.95 = .05

Z_{\frac{\alpha }{2}}  = Z_{\frac{.05 }{2}}  = 1.96

We want 95% confidence that the sample mean is within $140 of the population mean

margin of error ( E ) =140

let n be the sample size

margin of error ( E ) = Z_{\frac{\alpha }{2}}\frac{\sigma }{\sqrt{n}}

      squarring both side

E^{2} = 1.96^{2}\times\frac{\sigma ^{2}}{n}

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4 years ago
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