In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained: No. of misprints per page `(x)` : 0 1 2 3 4 5 No. of pages `(f)` : 154 95 36 9 5 1 Find the average number of misprints per page.

The following table gives the number of children of 150 families in a village No. of children (x) : 0 1 2 3 4 5 No. of families (f) : 10 21 55 42 15 7 Find the average number of children per family.

The following distribution gives the number of accidents met by 160 workers in a factory during a month. No. of accidents (x) : 0 1 2 3 4 No. of workers (f) : 70 52 34 3 1 Find the average number of accidents per worker.

Ila read 25 pages of a book containing 100 pages. Lalita read 2/5 of the same book. Who read less?

Isha read 25 pages of a book containing 100 pages. Nagma read 1/2 of the same book. Who read less?

Find the missing frequencies in the following frequency distribution if it is known that the mean of the distribution is 1.46. No of accident (x) 0 1 2 3 4 5 Total Frequency (f): 46 ? ? 25 10 5 200

Find the missing frequencies in the following frequency distribution if it is known that the mean of the distribution is 1.46. No. of accident (x) 0 1 2 3 4 5 Total Frequency (f): 46 ? ? 25 10 5 200

If the mean of the following distribution is 6, find the value of p. x: 2 4 6 10 p+5 f: 3 2 3 1 2

The number of telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 9 1 2 3 4 5 6 No. of intervals (f) : 15 24 29 46 54 43 39 Compute the mean number of calls per interval.

If the mean of the following distribution is 6, find the value of p {:(x:, 2, 4, 6, 10, p+5), (f:, 3, 2, 3, 1, 2):}

The following data is related to the number of mistakes in each page of a book containing 180 pages : Fit a Poisson distribution to the data. Obtain the theoretical frequencies.