Data handling-Test

1.   Given below are the marks obtained by 30 students of a class in a test.

        10, 8, 12, 17, 19, 17, 41, 40, 12, 46, 37, 17, 1, 9, 21, 13, 48, 12, 21, 19, 33, 5, 38, 39, 19, 23, 2, 6, 30, 27.

        Using tally marks prepare a frequency table such that 20�30 is a class interval.

2.   Study the following frequency table and answer the questions given below.

        (i)   What is the class interval?

        (ii)  Which class has the lowest frequency?

        (iii) Which class has the highest frequency?

        (iv) Which two classes have the same frequency?

                

        (v) What is the lower limit of the class-interval 300�325?

        (vi)What is the upper limit of the class interval 275�300?

3.   Observe the following histogram and answer the questions given below:

        (i)   What information is being given by the histogram?

        (ii)  Which group contains the maximum students?

        (iii) How many students have a height of 160 cm and more?

        (iv) What is the ratio of the number students in 130�140 cm group and the number of students in 160�170 cm groups?

4.   Look at the adjoining circle graph and answer the following questions.

        (i)   What is the central angle corresponding to the activities “school and home work”?

        (ii)  Find the fraction of the circle representing each of these given information.

5.   The number of students in hostel, speaking different languages is given below.

        Display the data by a pie chart.

        

6.   Numbers 1 to 10 are written on ten separate cards such that one number on one slip.

        These are mixed well and one slip is chosen from the box without looking into it. What is the probability of:

        (i)   getting a card on which 7 is written?

        (ii)  getting a card having two-digit number on it?

        (iii) getting a number less than 5?

        (iv) getting a number more than 5?

7.   When a die is thrown, list the outcomes of an event of getting:

        (i)   A number less than 5.

        (ii)  A composite number.

        (iii) A prime number.

        (iv) A number more than 3.