class lX statistics

Que-1 The height of 20 students of class V are noted as follows

4, 4.5, 5, 5.5, 4, 4, 4.5, 5, 5.5, 4, 3.5, 3.5, 4.2, 4.6, 4.2, 4.7, 5.5, 5.3, 5, 5.5.

1. Make a frequency distribution table for the above data.
2. Which is the most common height and which is the rarest height among these students?

Que2. The daily minimum questions solved by a student during a week were as under:

Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
35	30	27	32	23	28

Que 3-Find the mean.

If the mean of six observations y, y + 1, y + 4, y + 6, y + 8, y + 5 is 13, find the value of y.

Que4 - The mean weight of a class of 34 students is 46.5 kg. If the weight of the new boy is included, the mean is rises by 500 g. Find the weight of the new boy

Que 5-The range of the data:

25, 18, 20, 22, 16, 6, 17, 15, 12, 30, 32, 10, 19, 8, 11, 20 

Que 6-Draw histogram

 Que7-Obtain the mean of the following distribution:

Que 8-Draw a histogram to represent the following grouped frequency distribution: