Unit Test: Statistics | Mathematics (Maths) Class 10 PDF Download

Time: 1 hour

M.M. 30

Attempt all questions.

• Question numbers 1 to 5 carry 1 mark each.
• Question numbers 6 to 8 carry 2 marks each.
• Question numbers 9 to 11 carry 3 marks each.
• Question number 12 & 13 carry 5 marks each.

Q1: If the mean of first n natural numbers is 3n/5, then the value of n is: (1 Mark)

(a) 3
(b) 4
(c) 5
(d) 6

Q2: The class interval of a given observation is 10 to 15, then the class mark for this interval will be: (1 Mark)

(a) 11.5
(b) 12.5
(c) 12
(d) 14

Q3: If the sum of frequencies is 24, then the value of x in the observation: x, 5,6,1,2, will be: (1 Mark)

(a) 4
(b) 6
(c) 8
(d) 10

Q4: The ________ of a class is the frequency obtained by adding the frequencies of all the classes preceding the given class. (1 Mark)

Q5: The method used to find the mean of a given data is(are): (1 Mark)

(a) direct method
(b) assumed mean method
(c) step deviation method
(d) all the above

Q6: If the mode of the following data is 7, then find the value of k. (2 Marks)
2, 4, 6, 7, 5, 6, 10, 6, 7, 2k + 1, 9, 7, 13

Q7: The mean of 6 numbers is 16 with the removal of a number the mean of remaining numbers is 17. Find the removed number.  (2 Marks)

Q8: The mean of following frequency distribution is 70. Find the missing frequency x. (2 Marks)

Q9: Find the mode of the following distribution of marks obtained by the students in an examination:
Given the mean of the above distribution is 53, using emperical relationship estimate the value of its median.  (3 Marks)

Q10: Find the missing frequency (x) of the following data if its mode is ₹240.  (3 Marks)

Q11: The mean of the following frequency distribution is 62.8 and the sum of all frequencies is 50. Compute the missing frequencies f₁ and f₂. (3 Marks)

Q12: For Uttarakhand flood victims, money donated by teachers of a school is shown in the following frequency distribution:

Find mean and median for this data. (5 Marks)

Q13: Find the mean, mode and median of the following data: