Adaptive Practice
Statistics
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Question 1 of 10
⏱ 0:30
Easy
The marks obtained by 5 students in a Maths test are: 45, 50, 55, 60, 65. What is the mean of the marks?
Easy
In a frequency distribution, the class intervals are 10-20, 20-30, 30-40, 40-50. If the frequencies are 5, 8, 12, and 10 respectively, what is the total number of observations?
Medium
The median of the data set 12, 15, 18, 22, 27, 30 is:
Easy
Which of the following is the mode of the data set: 7, 9, 7, 10, 7, 9, 11?
Medium
The marks of 10 students in an exam are grouped as follows: 0-10(2), 10-20(3), 20-30(4), 30-40(1). What is the modal class?
Medium
If the mean of the data set 3, 7, x, 9, 11 is 8, find the value of x.
Medium
A box plot shows the lower quartile (Q1) as 15, median as 20, and upper quartile (Q3) as 30. What is the interquartile range (IQR)?
Hard
The cumulative frequency just greater than or equal to 25 is 28. What is the median class if the total frequency is 50?
Hard
The variance of the data set 2, 4, 6, 8, 10 is:
Easy
A survey in an Indian village found the daily water consumption (in liters) of 7 households as: 100, 120, 110, 130, 115, 125, 105. What is the median daily water consumption?