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MrRa [10]
3 years ago
8

I️ have to use 15 as Y

Mathematics
1 answer:
statuscvo [17]3 years ago
7 0
-1/5of 15 =-3 then add 3 2/5th which is 17/2 so -3+17/2 = 11/2=5 1/2
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<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}

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In this problem, we have that the mean and the standard deviation are given, respectively, by:

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The proportion of the batteries will last more than 420 hours is <u>one subtracted by the p-value of Z when X = 420</u>, hence:

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

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