How many outcomes does each trial of a binomial distribution have?
Correct answer A. Two outcomes
Subject / 721 questions
Statistics MCQs
Page 29 of Statistics multiple-choice questions with answers. Tap an option to check yourself.
Page 29 of 37
What is the smallest possible value of variance?
Correct answer E. 0
When measured from their mean, the sum of squared deviations of n values is what?
Correct answer A. Least
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What are the mean deviation, variance and standard deviation of 4, 4, 4, 4, 4, 4?
Correct answer E. 0
Variance is unaffected by a change of what?
Correct answer B. Origin
A change in which of the following alters a measure of dispersion?
Correct answer B. Scale
If a and b are constants, what is Var(a + bX)?
Correct answer B. b² Var(X)
What is a measure of dispersion always?
Correct answer B. Positive
Is standard deviation calculated from the harmonic mean?
Correct answer A. Never
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What is the algebraic sum of deviations from the mean?
Correct answer A. Zero
If X and Y are independent, what is SD(X − Y)?
Correct answer C. √(Var(X) + Var(Y))
After asking five classmates their heights, you state that the average height of all students at your university is 67 inches. What does this illustrate?
Correct answer C. Inferential Statistics
If the standard deviation of 2, 4, 6 and 8 is 2.58, what is the standard deviation of 4, 6, 8 and 10?
Correct answer C. 2.58
Which of these does not divide a set of observations into equal parts?
Correct answer E. Standard Deviations
If all values in a data set are identical, what is the measure of dispersion?
Correct answer A. 0
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Which measure compares the variation in two or more data sets even when they are in different units?
Correct answer A. Coefficient of Variation
A student’s height is 60 inches. What kind of data is this?
Correct answer C. Continuous data
What is the second moment about the mean?
Correct answer B. Variance
For which kind of distribution is the coefficient of skewness always zero?
Correct answer B. Symmetrical
What is the mean deviation of the values 18, 12 and 15?
Correct answer A. 2