Step-by-step explanation:
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Two lines, C and D, are represented by the equations given below:
1 answer:
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Hi there.
A = 30, w = 5, l = x - 2
We can divide the area by the width to find the length.
= 6
8 - 2 = 6
<em /><em>x = </em>8
A = 30, w = 5, l = x - 2
We can divide the area by the width to find the length.
8 - 2 = 6
<em /><em>x = </em>8
Using the normal distribution, it is found that the relative frequency of classical CDs with playing time X between 49 and 69 minutes is 0.8403 = 84.03%.
<h3>Normal Probability Distribution</h3>The z-score of a measure X of a normally distributed variable with mean and standard deviation
is given by:
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:
The relative frequency of classical CDs with playing time X between 49 and 69 minutes is the <u>p-value of Z when X = 69 subtracted by the p-value of Z when X = 49</u>, hence:
X = 69:
Z = 3
Z = 3 has a p-value of 0.9987.
X = 49:
Z = -1
Z = -1 has a p-value of 0.1584.
0.9987 - 0.1584 = 0.8403.
More can be learned about the normal distribution at brainly.com/question/4079902
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