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For the data set

The mode (correct to two decimal places) for the given data is:

For the study purpose, the mean of the observations is 148 gm and standard deviation is 17.4 gm. Approximately, the coefficient of variation equals to:

For a random variable x, the central moments (µi) of all order exist. The square of (2j + 1)^th   moment (µ²2j+1) is

From standard pack of 52 cards, 3 cards are drawn at random without replacement. The probability of drawing a king, a queen and a jack in order is

The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:

The grouped data for the observation are as follows.

Two random variables X and Y are said to be independent if:

For making frequency distribution, the number of classes used depends upon: