Which of the following is a measure of central tendency?

The mean of the following distribution is 52 & the frequency of class interval is Find

Explain the meaning of each of the following terms.
(i) Variate
(ii) Class interval
(iii) Class size
(iv) Class mark
(v) Class limint
(vi) True class limits
(vii) Frequency of a class
(viii) Cumulative frequency of a class

Which of the following can be an alternate representation of variance, where $x_i$ being the midpoint of class intervals, $f_i$ being frequency of class interval and $\overline{x}$ the mean,N = ${\sum }_{i=1}^n{f}_i$

Given below is a frequency distribution table. Read it and answer the questions that follow:
(a) What is the lower limit of the second-class interval?

(b) What is the upper limit of the last class interval?

(c) What is the frequency of the third class?

(d) Which interval has a frequency of 10?

(e) Which interval has the lowest frequency?

(f) What is the class size?