Answered: Part 1 The Mathematics section of the…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 1GP

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Part 1

The Mathematics section of the ACT test had a mean of

20.920.9

and an SD of

5.35.3

for the years

2013dash–2015.

Suppose these are well modeled by a Normal distribution.

a) About what percent of students scored over

3333?

b) About what percent of students scored under

1818?

c) About what percent of students scored between

1818

and

3333?

Question content area bottom

Part 1

a) About

1.11.1%

percent of students scored over

3333.

(Round to one decimal place as needed.)

Part 2

b) About

enter your response here%

percent of students scored under

1818.

(Round to one decimal place as needed.)

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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