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Ainat [17]
3 years ago
14

mollys jump rope is 6 1/3 feet long. Gals jump rope 4 2/3 feet lo g. How much longer is Molly's jump rope?

Mathematics
2 answers:
Vlad1618 [11]3 years ago
8 0
6 1/3- 4 2/3 =5 4/3- 4 2/3=1 2/3
You can't subtract fractions unless you have the same denominator.
Grace [21]3 years ago
8 0
The correct answer is 1 2/3 because 6 1/3=19/3 and 4 2/3=14/3 and 19/3-14/3=5/3=1 2/3
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Read 2 more answers
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anastassius [24]

Answer:

This value means that his shoe size is 2.9 deviations above the population mean.

And we can find the approximate percentile for his measure like this:

P(Z

This correspond to the 99.8 percentile, so then his shoe size is 99.8% above all the shoe sizes.

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the shoe size of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu,\sigma)  

Where \mu represent the mean and \sigma the population standard deviation.

For this case we know that a man obtain a z score of z=2.9

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And we can find the approximate percentile for his measure like this:

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This correspond to the 99.8 percentile, so then his shoe size is 99.8% above all the shoe sizes.

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3 years ago
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Answer:

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