Statistics

What is the median of the data set: 12, 15, 18, 20, 22?

If the mean of five numbers is 20, what is the sum of these numbers?

Which measure of central tendency is most affected by extreme values?

The mode of the data set 5, 8, 8, 10, 12, 8, 15 is:

The marks obtained by 10 students in a test are: 45, 50, 55, 60, 65, 70, 75, 80, 85, 90. What is the mean?

If the median of the data 3, 7, x, 9, 11 is 8, what is the value of x?

The class intervals of a frequency distribution are: 0-10, 10-20, 20-30, 30-40. Which of the following is the correct class mark of 20-30?

The sum of the frequencies of a grouped data is 50. If the mean is 12 and the sum of mid-point × frequency is 600, find the number of classes.

In a frequency distribution, if the mode is 30 and the frequencies of the modal class and its adjacent classes are 20, 30, and 10 respectively, find the modal class lower limit if the class size is 10 and the modal class is 30-40.

Given the data: 5, 8, 12, 15, 20, 22, 25, 30, 35, 40, find the first quartile (Q1).