Variance and standard deviation

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4

A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20, 16, 18, 20, 17, 16, 19 and 20 years. One student is selected in such a manner that each has the same chance of being chosen and the age X of the selected student is recorded. What is the probability distribution of the random variable X? Find mean, variance and standard deviation of X.

Consider the following statements: 1 Both variance and standard deviaiton are measures of variability in the population. 2. Standard deviation is the square of the variance. Which of the above statements is/are correct?

Find the mean, variance and the standard deviation for the following data : 5,9,8,12,6,10,6,8

The CAT scores of 60 students are summarized below: {:("Class ",40-50,50-60,60-70,70-80,80-90,90-100),("Frequency"," "10," "8," "12," "15," "10,"5):} Calculate the sample mean,the sample variance and the standard deviation for the grouped data

Find the mean,variance,standard deviation of number 6 in the two throws of a dice.

Measures Of Dispersion|Questions|Limitations Of Mean Deviation|Variance|Standard Deviation|Questions|OMR

Measures Of Dispersion|Questions|Limitations Of Mean Deviation|Variance|Standard Deviation|Questions|OMR