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Lena [83]
2 years ago
6

identify the expression as a numerical expression or a variable expression.For variable expression, name the variable 1×12​

Mathematics
1 answer:
Aliun [14]2 years ago
5 0

Answer:

o7 fy hk hpxi oyli ifuod pir8

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When Ximena commutes to work, the amount of time it takes her to arrive is normally distributed with a mean of 38 minutes and a
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Answer:

The interval that represents the middle 68% of her commute times is between 33.5 and 42.5 minutes.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

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Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 38 minutes, standard deviation of 4.5 minutes.

Determine the interval that represents the middle 68% of her commute times.

Within 1 standard deviation of the mean. So

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38 + 4.5 = 42.5 minutes.

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