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PEDS109 (14)
John Dunn (14)
Lecture

# Sept 26 - scales of measurement part 2.doc

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School
University of Alberta
Department
Physical Education and Sport
Course
PEDS109
Professor
John Dunn
Semester
Fall

Description
Sept 26 – Scales of Measurement Continued Guidelines for Mathematical Operations and Basic Mathematics Review ( page 677-698) 1.) All values that are multiplied together or squared are considered to be parts of one expression Ex. XY Mastery Iterm Columns 1 x 2 =2 2 x 5 = 10 4 x 3 = 12 6 x 1 = 6 9 x 6 = 54 Sigma xy = 84 Page 2 X – 1+2+4+6+9 =22 Y – 2+5+3+1+6= 17 22 x 17 = 374 Sigma X^2 – square value of x then add them all up (sigma X)^2 – add everyone x then squre the sum of the x scores Once you add parantheses, do whats inside the parenthesis first, then do what is outside the parenthesis 2.) When the expression following a summation sign involves parantheses and multiplication/squaring, first complete the calculations within the parentheses, then perform the multiplication or squaring and then sum Page 3 X-2 column 3-2 =1 1-2 = -1 7-2 = 5 4-2 = 2 (X-2)^2 1^2 = 1 -1^2= 1 5^2 – 25 2^2 = 4 Sigma (X-2)^2 = 31 3.) Without parentheses, the mathematical expression following a summation sign ends
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