CompTIA
Checkpoint
ISC
HP
Dell
EC-Council
EXIN
Fortinet
ITIL®
Juniper
PMI
Microsoft
VMware
Avaya
Google
Salesforce
Amazon
Palo Alto Networks
Certiport
ISC2
All Vendors
  2. Home
  3. Exams
  4. Test Prep
  5. CFA-Level-I

Free CFA-Level-I Exam Braindumps (page: 171)

Page 170 of 991
PDF with 3963 Questions

What disadvantage(s) are there of the mean deviation?

  1. None of these answers.
  2. It is based on only two observations.
  3. It is based on deviations from the mean.
  4. All of these answers.
  5. It uses absolute values, which are difficult to manipulate.

Answer(s): E

Explanation:

Using absolute values can cause problems since they are difficult to work with.



In a stratified random sampling method,

  1. a sample is selected by randomly generating an integer, N, and selecting every Nth member of the population.
  2. a sample is selected by first dividing the population into groups and then selecting members from each group.
  3. a sample is selected by drawing numbers from a normal probability distribution.
  4. a sample selected such that every member of the population has the same chance of being selected.

Answer(s): B

Explanation:

The population is divided into strata or subcategories and a sample is randomly selected from each strata.



Ten experts rated a newly developed chocolate chip cookie on a scale of 1 to 50. Their ratings were: 34, 35, 41, 28, 26, 29, 32, 36, 38 and 40. What is the mean deviation?

  1. 12.67
  2. 4.12
  3. 0.75
  4. 8.00
  5. None of these answers

Answer(s): B

Explanation:

The mean is 33.9. The mean deviation is the absolute values of the deviation from the mean. (0.1 + 1.1 + 7.1 + 5.9 + 7.9 + 4.9 + 1.9 + 2.1 + 4.1 + 6.1)/10 = 41.2/10 = 4.12



Which of the following are formulas for sample variance?

  1. [1/(n-1)] * sum (as i goes from 1 to n) of (X_i - Xbar)^2.
    II. [1/n] * sum (as i goes from 1 to n) of (X_i - Xbar)^2.
    III. [1/(n-1)] * {sum (as i goes from 1 to n) of (X_i)^2 - (1/n) * [sum (as i goes from 1 to n) of (X_i)]^2}.
  2. I only.
  3. None of these answers is correct.
  4. III only.
  5. II only.

Answer(s): B

Explanation:

I and III are equivalent and correct; III is the computational formula for sample variance.






Post your Comments and Discuss Test Prep CFA-Level-I exam with other Community members:

CFA-Level-I Discussions & Posts