Unit 03, Review complete.pdf

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1

Mar 268:20 AM

. In a sample of 50 high school students, 15 said that math was their favourite subject. If these data were represented in a circle graph, the corresponding sector angle would be

a. 15° b. 30° c. 54° d. 108°

Mar 268:20 AM

2. A set of data has values ranging from 420 to 2150. To create a histogram, the most

appropriate spread for a

class interval

would be

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2

Mar 268:22 AM

3. The amount of time spent studying for a math test and the mark achieved would likely exhibit

a. a positive correlation c. no correlation

b. a negative correlation d. a dependent trend

Mar 268:23 AM

. If two variables have no correlation

a.

the coefficient of correlation is around 1

b.

a medianmedian line must be used to predict trends

c.

the line of best fit has a negative slope

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3

Mar 268:24 AM

5. The regression line shown would have a correlation coefficient closest to

a. 1 b. 0.5 c. 1 D) 0

Mar 268:25 AM

6. Which of the statements is not true about variables having a correlation coefficient of 1? a. all data points lie on the line of best fit

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4

Mar 268:26 AM

A uniform candle is burned. A scatter plot is created showing the

Total Time burning and Height of a Candle. What type of

correlation would exist? Explain

Mar 268:27 AM

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5

Mar 268:28 AM

9. For graph below, indicate how many variables you have collected about each person and list what the variable(s) is/are.

Mar 2610:44 AM

10. A sociologist at a Canadian university wants to study the attitudes of female university students towards careers. He interviews 100 of the female students enrolled in a firstyear sociology course at his university. What is the sample in this situation?

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6

Mar 2610:49 AM

11. Determine whether the data represents onevariable or twovariable data. Justify your answer. a) A class surveys grade 12 students on the time spent on mathematics and English homework. b) A market research company compiles data on the number of cellular telephones sold by each cellular telephone company.

Mar 2610:54 AM

12. Identify which principle(s) of surveying are not being followed in each example.

Explain what is wrong with the survey.

a) The following statement was at the beginning of a survey: “Please write your

name in the space at the top of the page.”

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7

Mar 2610:57 AM

13. Add the line of best fit to the graphs above.

Mar 2610:58 AM

14. Sketch a scatter plot which has…

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8

Mar 278:32 AM

15. Create two questions that could appear on a municipal survey concerning the

proposed new casino.

a) Dichotomous

b) completion