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Free CFA-Level-I Exam Braindumps (page: 177)

Page 176 of 991
PDF with 3963 Questions

Which measure of central tendency is used to determine the average annual percent increase?

  1. Mode
  2. Mean
  3. Weighted mean
  4. Median
  5. Geometric mean

Answer(s): E

Explanation:

The formulaic presentation of the geometric mean is suited for calculating percentage changes. The geometric mean of a set of n positive numbers and is defined as the nth root of the product of the n numbers The two main uses of the geometric mean (GM) are:
1. To average percents, indexes, and relatives, and
2. To determine the average percent increase in sales, production or other business or economic series from one time period to another.



Given the following four points: (-2, 0), (-1,0), (0,1), (1, 1) and (2, 3)

What is the standard error of the regression line estimate?

  1. None of these answers
  2. 0.135
  3. 0
  4. 0.606
  5. 0.367

Answer(s): C

Explanation:

For this, you need to create tables with columns for X,Y,XY,X^2,Y' and Y-Y'. This will be as follows.
XYXY X^2 Y'Y-Y'
-2004-0.40.4
-10010.3-0.3
010010
11111.7-0.7
23642.40.6
Sum057100
N=5.
The regression equation is Y' = a + bX.
The standard error of estimate is
s = sq. root of [S(Y-Y')^2/n-2] where S stands for "Sum of." S = [0^2/3] = 0.



A study of the opinion of designers with respect to the primary color most desirable for use in executive offices

showed that:

Primary Color Number of Opinions
Red 92
Orange 86
Yellow 46
Green 91
Blue 37
Indigo 46
Violet 2

What is the probability that a designer does not prefer yellow?

  1. 1.000
  2. 0.885
  3. None of these answers
  4. 0.765
  5. 0.000

Answer(s): B

Explanation:

There are 400 opinions. 46/400 prefer yellow. So 1 - 46/400 = 177/200 = 0.885 does not prefer yellow.



What is the median of 26, 30, 24, 32, 32, 31, 27 and 29?

  1. 32
  2. 30
  3. None of these answers
  4. 29
  5. 29.5

Answer(s): E

Explanation:

Ordering the numbers we have 24,26,27,29,30,31,32,32. Since there is an even number of observations (8), the median is the average of the two middle observations (29 + 30)/2 = 29.5.






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