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2 years ago

8

Today, 5 friends went out for lunch. Their total bill was $20.82, including tax and gratuity. One of the ordered only soda and n

eeded to pay only $1.70. The
other 4 friends ordered the same daily special. How much did each of the other friends need to pay?

1 answer:

Juliette [100K]2 years ago

6 0

I don’t know i’m very sorry but how about $19.89

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3 years ago

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A commercial building contractor is trying to decide which of two projects to commit her company to. Project A will yield a prof

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Step-by-step explanation:

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The contractor should choose Project A based on the expected value of profit.

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3 years ago

How long will it take Karen to drive 975 miles, if her average speed is 65 miles per hour? Write a formula

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3 years ago

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Which expression has a value of 35 when

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3 years ago

A random sample of 10 shipments of stick-on labels showed the following order sizes.10,520 56,910 52,454 17,902 25,914 56,607 21

sammy [17]

Answer:

Confidence Interval: (21596,46428)

Step-by-step explanation:

We are given the following data set:

10520, 56910, 52454, 17902, 25914, 56607, 21861, 25039, 25983, 46929

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{340119}{10} = 34011.9$

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$S.D = \sqrt{\frac{2711418821}{9}} = 17357.09$

Confidence interval:

$\mu \pm t_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 9 and}~\alpha_{0.05} = \pm 2.2621$

$34011.9 \pm 2.2621(\frac{17357.09}{\sqrt{10}} ) = 34011.9 \pm 12416.20 = (21595.7,46428.1) \approx (21596,46428)$

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3 years ago