A. Find the range. B. Find the standard deviation. C. Find the variance.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 7E
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From a 300 reinforcing steel bars, some were tested in terms of its tensile strength and recorded in a frequency table as shown.

A. Find the range.

B. Find the standard deviation.

C. Find the variance.

Bar
Strength
(MPa)
240-269
270-299
300-329
330-359
360-389
Number
of bars
22
17
4
7
Transcribed Image Text:Bar Strength (MPa) 240-269 270-299 300-329 330-359 360-389 Number of bars 22 17 4 7
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