Title Ch. 6: 25 Scatterplots a) depict relationships as dot clusters b) provide

Question

Title Ch. 6: 25 Scatterplots a) depict relationships as dot clusters b) provide a preview of the fully measured relationship. c) show any pronounced curvilinearity d) all of the above 26 Which one of the following numbers couldn't possibly be a value of ? a) 000 b)-1.00 c)1.00 d) 1.03 27. If it were impossible to predict taxes from annual income, the value of r for income and taxes should be nearest to a) 0.00 b)-1.00 c) 1.00 d) none of the above. 28. Although designed or ginally for use with quantative data, the Pearson r has been extended to other kinds of siftuations incuding those that involve a) ranks c) ordered qualitative and quantitative data. b) ordered qualitative data d) all of the above 29. When outliers occur, the best strategy is to report a) the values of r both with and without any outliers b) the value of rwith any outliers

Explanation / Answer

25:

Scatter plot gives overview of relationship between the variables. Sactter plot shows pairs (x,y) as dot.

Correct option : d

26:

The value of r must be between -1 and 1 (inclusive).

Correct option : d

27:

Since there is almost no relationship between the variables taxes and income so r between them must be near zero.

Correct option : a

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