QUESTION: 585

The heights of the five members in a family have been measured and found to be (in centimeters):
146, 162, 165, 187, 152
The range and the mean deviation of the heights are:

41, 46.9
41, 54.4
41, 10.9
49, 61.8

Answer(s): C

Explanation:

range = maximum value - minimum value = 187 - 146 = 41 centimeters. To calculate the mean deviation, you have to first calculate the mean. The mean equals (146 + 162 + 165 + 187 + 152)/5 = 162.4. The total deviation is abs(146-162.4) + abs(162-162.4) + abs(165-162.4) + abs(187-162.4) + abs(152-162.4) = 16.4 + 0.4 + 2.6 + 24.6 + 10.4 = 54.4. Therefore, MD = 54.4/5 = 10.88.

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QUESTION: 586

How long will it take for an initial deposit of $2,500 to grow to be $4,000, if the interest rate is 5% per year, compounded annually?

32 years
9.63 years
7.72 years
6.93 years
14.48 years

Answer(s): B

Explanation:

Either the $2,500 or the $4,000 must be entered as a negative number - it won't matter which. On the BAII Plus, press 5 I/Y, 2500 PV, 0 PMT, 4000 +/- FV, CPT N. On the HP12C, press 5 i, 2500 PV, 0 PMT, 4000 CHS FV,
F. Note that the HP12C will indicate 10 years for the answer.

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QUESTION: 587

Which of the following is/are true?

Multiplying a variable by a positive constant will cause its standard deviation to be multiplied by the square of that constant.
II. Multiplying a variable by a constant will cause its mean to be multiplied by that constant.
III. Adding a constant leaves the mean of a variable unchanged.
IV. Adding a positive constant to a variable causes the standard deviation of the variable to increase by the same amount.
IV only
I, II and IV
II only
I only
I & II
III only
II only
II and IV

Answer(s): C

Explanation:

Adding a constant changes the mean by the same amount and leaves the variance and standard deviation unchanged. Multiplying with a constant causes the mean and the standard deviation to be multiplied by the same constant. The variance gets multiplied by the square of the constant.

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QUESTION: 588

If the alternate hypothesis states that u (Mu) does not equal 4,000, what is the rejection region for the hypothesis test?

Center
None of these answers
Lower or left tail
Upper or right tail
Both tails

Answer(s): E

Explanation:

The alternate hypothesis says does not equal, which means it could be less or more than 4000. So we must consider both tails.

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Free CFA-Level-I Exam Braindumps (page: 147)

QUESTION: 585

Explanation:

QUESTION: 586

Explanation:

QUESTION: 587

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QUESTION: 588

Explanation: