22.22 × 8.99 + 142.15 = ? => ? = 22 × 9 + 142 => ? = 198 + 142 => ? = 340
Two random variables X and Y are said to be independent if:
For a random variable x, the central moments (µi) of all order exist. The square of (2j + 1)th moment (µ22j+1) is
A Poisson distribution has a double mode at x = 1 and x = 2. The probability for x = 1 or for x = 2 of these two values is:
The following observations 14, 19, 17, 20, 25 constitute a random sample from an unknown population with mean u and standard deviation σ.
The...
For a distribution with mean, median, mode and standard deviation 25, 24, 26 and 5 respectively, Karl Pearson's coefficient of skewness equals to:
The Mean deviation about Median for the given data.
52, 56, 66, 70, 75, 80, 82 is:
Which of the following is an example of using a sample to make inference about a population?
The mean and median of the distribution are 10 and 11 respectively, then the mode equals to
The variance of degenerate random variable is:
