Statistics

What is the median of the following data set representing the ages of students in a class: 12, 14, 13, 15, 16?

In a frequency distribution table, the sum of all frequencies is called:

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

The mean of the marks obtained by 5 students is 72. If one student's marks are incorrectly recorded as 78 instead of 68, what is the correct mean?

Which measure of central tendency is most affected by extreme values in a data set?

If the mean of the data set 2, 4, x, 8, 10 is 6, find the value of x.

A class test has scores with a mean of 65 and a standard deviation of 5. If a student scored 75, how many standard deviations above the mean is this score?

The heights (in cm) of 5 plants are: 45, 50, 55, 60, 65. What is the variance of the heights?

In a grouped frequency distribution, the class intervals are 10-20, 20-30, 30-40, 40-50. Which class interval is called the modal class?

The cumulative frequency just greater than or equal to half the total frequency is used to find which measure?