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Free CFA-Level-I Exam Braindumps (page: 293)

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PDF with 3963 Questions

What does the coefficient of determination equal if r = 0.89?

  1. 0.94
  2. None of these answers
  3. 0.89
  4. 0.06
  5. 0.79

Answer(s): E

Explanation:

The coefficient of determination is the r-squared.



The semi-logarithmic scale is so named because:

  1. Values on the x-axis are equally spaced if their logarithms are the same.
  2. Values on the y-axis are equally spaced if their logarithms are the same.
  3. Values on the x-axis are equally spaced if there are equal differences in their logarithms.
  4. Values on the y-axis are equally spaced if there are equal differences in their logarithms.

Answer(s): D

Explanation:

Values on the y-axis are equally spaced if there are equal differences in their logarithms. Thus, 100 is as close to 10, as 10 is to 1. (In base 10, log 100 - log 10 = 1, log 10 - log 1 = 1; in base e, the differences are also the same, each equal to 2.302.)



The annual commissions per salesperson employed by a manufacturer of light machinery averaged $40,000 with a standard deviation of $5,000. What percent of the sales persons earn between $32,000 and $42,000?

  1. 60.06%
  2. 34.13%
  3. 39.94%
  4. None of these answers
  5. 81.66%

Answer(s): A

Explanation:

z = (x - u)/sigma. z1 = (32000 - 40000)/5000 = -1.6. z2 = (42000 - 40000)/5000 = 0.4. The area under the curve for the respective z values are 0.4452 and 0.1554. Since the earnings are on the opposite sides of the mean, we add them up 0.4452 + 0.1554 = 0.6006.



The weights of cans of fruit are normally distributed with a mean of 1,000 grams and a standard deviation of 50 grams. What portion of the cans weigh 860 grams or less?

  1. None of these answers
  2. 0.8400
  3. 0.0001
  4. 0.0100
  5. 0.0026

Answer(s): E

Explanation:

z = (x-u)/sigma = 860 - 1000/50 = -2.8. For z = 2.8, the area is 0.4974. So 1.0 - 0.9974 = 0.0026.






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