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Free CFA-Level-I Exam Braindumps (page: 172)

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PDF with 3963 Questions

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:

  1. 41, 46.9
  2. 41, 54.4
  3. 41, 10.9
  4. 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.



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?

  1. 32 years
  2. 9.63 years
  3. 7.72 years
  4. 6.93 years
  5. 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.



Which of the following is/are true?

  1. 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.
  2. IV only
  3. I, II and IV
  4. II only
  5. I only
  6. I & II
  7. III only
  8. II only
  9. 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.



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

  1. Center
  2. None of these answers
  3. Lower or left tail
  4. Upper or right tail
  5. 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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