Given below is a frequency distribution table. read it and answer the questions that follow.
Class interval | Frequency |
$$ 10-20 $$ | $$ 5 $$ |
$$ 20-30 $$ | $$ 10 $$ |
$$ 30- 40 $$ | $$ 4 $$ |
$$ 40 -50 $$ | $$ 15 $$ |
$$ 50 -60 \quad \quad \quad 12 $$
(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 ?