Written Assignment 2 - Gabriel A. Godart

Written Assignment 2 - Gabriel A. Godart - Principles of...

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Principles of Statistics – STA201 Written Assignment 2 Gabriel A. Godart Thomas Edison State College. Exercises 2.1 Exercise 2.6 a. The States listed in the first column consist of qualitative data b. The number of actions listed in the second column consists of quantitative, discrete data. c. The number of doctors listed in the third column consists of quantitative, discrete data. Exercises 2.2 Exercise 2.18 a. Frequency is the number of observations that falls in a class. Relative frequency is the ratio of the frequency of a class to the total number of observations. b. The percentage is the relative frequency multiplied by 100. Exercise 2.28 Television ratings Frequenc y Relative Frequency Midpoint 40 42 10 0.3125 41 42 44 6 0.1875 43 44 46 7 0.21875 45 46 48 6 0.1875 47 48 50 3 0.09375 49 32 1.00
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a. Age (yr) Under 21 21-25 Over 25 Tota l Sex Male |||| ||| |||| |||| || || 22 Female |||| |||| || |||| |||| ||| ||| 28 Total 20 25 5 50 b. Age (yr) Under 21 21-25 Over 25 Total Male 8 12 2 22 Female 12 13 3 28 Total 20 25 5 50 c. The total number of observations per age and per sex. It is the frequency distribution. d. The two sums are equal because both the qualitative variable sex and the quantitative variable age originate from the same population of 50 students from a freshman calculus course. e. Age (yr) Under 21 21-25 Over 25 Total Male 0.16 0.24 0.04 0.44 Female 0.24 0.26 0.06 0.56 Total 0.40 0.50 0.10 1.00 f. 40% of the population is under 21. 24% of males are between 21 and 25.
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Written Assignment 2 - Gabriel A. Godart - Principles of...

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