Statistics

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

If the mean of five numbers is 24, what is the sum of these numbers?

The mode of the data set 5, 7, 5, 9, 7, 5, 8 is:

A frequency distribution has class intervals 10-20, 20-30, 30-40, 40-50. Which of the following is the correct class mark for 30-40?

The mean of the following data is 20. Find the missing frequency 'x'. Class intervals: 0-10, 10-20, 20-30 Frequencies: 5, x, 10 Class marks: 5, 15, 25

Which measure of central tendency is best to use when data is skewed?

Find the variance of the data set: 4, 8, 6, 5, 3

A bar graph shows the number of mangoes sold in 4 weeks as 30, 45, 40, and 35. What is the mean number of mangoes sold per week?

The cumulative frequency of the class 20-30 in a distribution is 40. What does it represent?

In a grouped frequency distribution, the total number of observations is 100. If the median class is 30-40 with cumulative frequency just before median class as 40 and frequency of median class as 30, find the median.