(d) below 18, and (e) below 4?

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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parts d - e

An education researcher has been studying test anxiety using a particular measure, which she administers to students prior to midterm exams. On this measure, she has
found that the distribution follows a normal curve. The measure has a mean of 17 and a standard deviation of 5. Using the accompanying normal curve table, what
percentage of students have scores (a) above 30, (b) above 20, (c) above 18, (d) below 18, and (e) below 4?
Click here to view page 1 of the normal curve table. Click here to view page 2 of the normal curve table. Click here to view page 3 of the normal curve table.
Click here to view page 4 of the normal curve table.
Transcribed Image Text:An education researcher has been studying test anxiety using a particular measure, which she administers to students prior to midterm exams. On this measure, she has found that the distribution follows a normal curve. The measure has a mean of 17 and a standard deviation of 5. Using the accompanying normal curve table, what percentage of students have scores (a) above 30, (b) above 20, (c) above 18, (d) below 18, and (e) below 4? Click here to view page 1 of the normal curve table. Click here to view page 2 of the normal curve table. Click here to view page 3 of the normal curve table. Click here to view page 4 of the normal curve table.
Expert Solution
Step 1

We have given,

The random variable x follows normal distribution with mean μ and a standard deviation σ.

μ=17,  σ=5

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