Which one of the following statements is NOT true

Home / Engineering Maths / Probability And Statistics / Question

Examveda

Which one of the following statements is NOT true?

A. The measure of skewness is dependent upon the amount of dispersion

B. In a symmetric distribution, the values of mean, mode and median are the same

C. In a positively skewed distribution: mean > median > mode

D. In a negatively skewed distribution: mode > mean > median

Answer: Option D

This Question Belongs to Engineering Maths >> Probability And Statistics

Join The Discussion

Related Questions on Probability and Statistics

Aishwarya studies either computer science or mathematics everyday. If she studies computer science on a day, then the probability that she studies mathematics the next day is 0.6. If she studies mathematics on a day, then the, probability that she studies computer science the next day is 0.4. Given that Aishwarya studies computer science on Monday, what is the probability that she studies computer science on Wednesday?

A. 0.24

B. 0.36

C. 0.4

D. 0.6

View Answer

View Answer

A coin is tossed 4 times. What is the probability of getting heads exactly 3 times?

A. $$\frac{1}{4}$$

B. $$\frac{3}{8}$$

C. $$\frac{1}{2}$$

D. $$\frac{3}{4}$$

View Answer

View Answer

A machine produces 0, 1 or 2 defective pieces in a day with associated probability of $$\frac{1}{6},\,\frac{2}{3}$$ and $$\frac{1}{6}$$ respectively. The mean value and the variance of the number of defective pieces produced by the machine in a day, respectively, are

A. 1 and $$\frac{1}{3}$$

B. $$\frac{1}{3}$$ and 1

C. 1 and $$\frac{4}{3}$$

D. $$\frac{1}{3}$$ and $$\frac{4}{3}$$

View Answer

View Answer

Let X and Y be two independent random variables. Which one of the relations between expectation (E), variance (Var) and covariance (Cov) given below is FALSE?

A. E(XY) = E(X) E(Y)

B. Cov (X, Y) = 0

C. Var (X + Y) = Var (X) + Var (Y)

D. E(X²Y²) = (E(X))² (E(Y))²

View Answer

View Answer

More Related Questions on Probability and Statistics