Psyc_315_Winter_2010_-_Class_3

Psyc_315_Winter_2010_-_Class_3 - Recap of Last Class...

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1 1 Recap of Last Class • Ungrouped and Grouped Frequency Tables – Frequency – Percentage – Relative Frequency – Cumulative Frequency – Cumulative Percentage – Guidelines to Creating Class Intervals – Real Limits – Percentile Ranks and Scores Exercises on Scales of Measurement and Frequency distributions #1 For each of the following characteristics, tell whether it is a variable or a constant. If it is a variable, say whether it is a qualitative variable, a discrete quantitative variable, or a continuous quantitative variable. a) the number of square feet in a square yard b) the number of square feet in each room of a house, where N is the number of rooms c) the number of children in a family d) the occupations of the fathers of the children in a third-grade class people’s ages 2 Exercises on Scales of Measurement and Frequency distributions #2 Identify the scale of measurement used in the following examples (i.e., nominal, ordinal, interval, or ratio). a) An instructor records the order in which students finish an in-class assignment; i.e. first, second, third etc. b) The Stanford-Binet I.Q. test. c) Weight, measured in kilos. d) Scores from 1 to 6 from an artistic skating competition. e) Gender on a census form. f) List of the five best NHL hockey teams. 3
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Exercises on Scales of Measurement and Frequency distributions #3 Answer the folowing questions based on the simple frequency distribution of quiz scores below X f Rel f (%) c f c f (%) 5 1 10 10 100 4 2 20 9 90 3 2 20 7 70 2 3 30 5 50 1 2 20 2 20 a. n = ? b. What is the sum of quiz scores for this sample? c. What proportion of students scored 2 and higher? d. How many people got a score of 4? e. How many people got a score of 4 or lower? 4 Exercises on Scales of Measurement and Frequency distributions #4 Given the following set of numbers: 466 321 87 502 100 56 612 a. What is X? b. What is
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This note was uploaded on 04/29/2010 for the course PSYCH 315 taught by Professor Afroditipanagopoulos during the Winter '10 term at Concordia Canada.

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Psyc_315_Winter_2010_-_Class_3 - Recap of Last Class...

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