A. 21
B. 24
C. 28
D. 0
Related Mcqs:
- If the sampled population has a normal distribution, when is the sampling distribution of the sample mean X also a normal distribution ?
A. Only when the sample size is at least 100.
B. Only when the sample size is smaller than 30
C. Always
D. Only when the sample size is at least 30. - Arithmetic Mean is___________affected by extreme values?
A. Not
B. Highly
C. Less
D. None of these - Arithmetic mean of two positive numbers “X” and “Y” is_________________?
A. ab2
B. 2a2
C. (a+b)/2
D. a−b2
E. 2a+b - Arithmetic mean is _________ by change of origin and scale of measurement?
A. Vary
B. Negative
C. Affected
D. Not affected - The arithmetic mean _________ by 10 if 10 is added to all values?
A. Decease
B. Smaller
C. Largest
D. Increase - The arithmetic mean of 10,8,6,4, and 2 is ______________?
A. 5
B. 15
C. 6
D. 30 - The mean of a distribution is 23, the median is 24, and the mode is 25.5. It is most likely that this distribution is_____________?
A. Positively Skewed
B. Symmetrical
C. Asymptotic
D. Negatively Skewed - Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?
A. Approximately normal because the sample size is small relative to the population size
B. Approximately normal because of the central limit theorem
C. Exactly
D. None of these alternatives is correct - If the third moment about mean is zero then distribution is_______________?
A. Mesokurtic
B. Positively Skewed
C. Symmetrical
D. Negatively Skewed - condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ?
A. n > 30
B. N(1 – p) > 5
C. 2 n 5
E. N < 30
