Draw the less than cummulative frequency graph for the following distribution giving 300 telephone calls according to the duration in seconds.

Draw the less than cumulative frequency graph for he following data :

Draw ‘less than’ cumulative frequency curve on the basis of following distribution :

Draw a frequency polygon for the following frequency distribution

Draw a histogram for the frequency distributions of the following data

Draw ‘less than ogive’ for the following data and determine median :

Draw a histogram to represent the following frequency distribution

Draw a histogram to represent the following grouped frequency distribution:

The screws produced by a certain machine were checked by examining samples of 7. The following table shows the distribution of 128 samples according to the number of defective items they contained. Fit a binomial distribution and find the expected frequencies if the chance of screw being defective is 1/2 . Also find the mean and variance of the fitted distribution.

In a telephone enquiry system, the number of phone calls regarding relevant enquiry follow poisson distribution with an average of five phone calls during 10-minute time intervals. The probability that there is at the most one phone call during a 10-minute time period is

On the basis of the following frequency distribution draw less than cumulative frequency curve.