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Nesterboy [21]
2 years ago
13

Find the next three terms in the sequence: -1, -3, -9,

Mathematics
1 answer:
MrRa [10]2 years ago
8 0

Answer:

-1,-3,-9,-27,-81,-243...

Step-by-step explanation:

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Suppose that replacement times for washing machines are normally distributed with a mean of 9.4 years and a standard deviation o
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Using the normal distribution, it is found that the replacement time that separates the top 18% from the bottom 82% is of 11.23 years.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
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In this problem, the mean and the standard deviation are, respectively, given by \mu = 9.4, \sigma = 2.

The desired value is the 82nd percentile, which is X when Z = 0.915, hence:

Z = \frac{X - \mu}{\sigma}

0.915 = \frac{X - 9.4}{2}

X - 9.4 = 0.915(2)

X = 11.23

The replacement time that separates the top 18% from the bottom 82% is of 11.23 years.

More can be learned about the normal distribution at brainly.com/question/24663213

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