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18 June, 10:08

Suppose that you have analyzed the relationship between population density and crime rate among 20 American capital cities, and obtain an r - + 28. In order to test the significance of this association, we calculate the value of t. Which of the following figures comes closest to that value? A. 0.09B. 4.31C. 2.57D. 1.24

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  1. 18 June, 10:21
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    T is equal 1.4. None of the previous values are correct.

    Explanation:

    t = r * sqrt ((n-2) / (1 - r^2))

    = 0.28 * sqrt (18/0.72)

    = 1.4

    T is simply the calculated difference represented in units of standard error. The greater the magnitude of T, the greater the evidence against the null hypothesis.
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Home » Business » Suppose that you have analyzed the relationship between population density and crime rate among 20 American capital cities, and obtain an r - + 28. In order to test the significance of this association, we calculate the value of t.
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