QUESTION: 897

The weight of an offensive lineman may be 210 pounds, 210.1 pounds, 210.13 pounds or 210.137 pounds depending on the accuracy of the scale. What is this an illustration of?

none of these answers
discrete random variable
continuous random variable
all of these answers
complement rule

Answer(s): C

Explanation:

The weight changes are in a random fashion and without a separate interval. Therefore it is continuous and random.

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QUESTION: 898

Suppose the least squares regression equation is Y' = 1202 + 1,133X. When X=3, what does Y' equal?

None of these answers
5,734
4,601
8,000
4,050

Answer(s): C

Explanation:

Y' = 1202 + 1133(3) = 4601.

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The following is a distribution of monthly commissions:

Monthly Commissions Class Frequencies
$600 - $7993
$800 - $9997
$1,000 - $1,19911
$1,200 - $1,39922
$1,400 - $1,59940
$1,600 - $1,79924
$1,800 - $1,9999
$2,000 - $2,1994

Referring to the table above, what is the relative frequency for those salespersons that earn between $1,600 and $1,799?

24%
2.4%
None of these answers
20%
2%

Answer(s): D

Explanation:

The sum of all the class frequencies is 120. The relative frequency for the $1600-$1799 class is therefore 24/120 = 20%

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QUESTION: 900

You are examining a group of 3 stocks within an industry. The industry average debt-to-equity ratio is expected to be 40%. For these stocks, the average debt-to-equity ratios have been 50%, 40%, and 30%. What is the mean absolute deviation of debt-to-equity ratios from the industry average?

13.3%.
6.67%.
20.0%.
0%.

Answer(s): B

Explanation:

The mean absolute deviation = the sum of (as i goes from 1 to n) of the absolute value of (X_i - Xbar), divided by n. Here, we have [|50% - 40%| + |40% - 40%| + |30% - 40%|]/3 = [10% + 0% + 10%] / 3 = 20%/3 = 6.67%.

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Free CFA-Level-I Exam Braindumps (page: 225)

QUESTION: 897

Explanation:

QUESTION: 898

Explanation:

QUESTION: 899

Explanation:

QUESTION: 900

Explanation: