Answer:
824.5
Step-by-step explanation:
Using the normal distribution, it is found that there are 68 students with scores between 72 and 82.
<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.
In this problem, the mean and the standard deviation are given, respectively, by:
The proportion of students with scores between 72 and 82 is the <u>p-value of Z when X = 82 subtracted by the p-value of Z when X = 72</u>.
X = 82:
Z = 1
Z = 1 has a p-value of 0.84.
X = 72:
Z = 0
Z = 0 has a p-value of 0.5.
0.84 - 0.5 = 0.34.
Out of 200 students, the number is given by:
0.34 x 200 = 68 students with scores between 72 and 82.
More can be learned about the normal distribution at brainly.com/question/24663213
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Answer:
10
Step-by-step explanation:
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<em>WHAT</em><em> </em><em>DO</em><em> </em><em>U</em><em> </em><em>Mea</em><em>n</em><em>?</em><em>?</em><em>?</em>
<em>Dont</em><em> </em><em>waste</em><em> </em><em>your</em><em> </em><em>points</em><em> </em><em>in</em><em> </em><em>such</em><em> </em><em>unnecessar</em><em>y</em><em> </em><em>things</em><em>.</em>
<h2>
<em>hope</em><em> </em><em>u</em><em> </em><em>understand</em><em>.</em><em>.</em><em>.</em></h2>