Cumulative Frequency

Q.

The following distribution gives the daily income of 50 workers if a factory. Convert the distribution above to a less than type cumulative frequency distribution and draw its ogive.

Daily income in Rupees	$100-120$	$120-140$	$140-160$	$160-180$	$180-200$
Number of workers	$12$	$14$	$8$	$6$	$10$

Q.

The following table shows the number of deaths due to fatal accidents in different age groups in a town.

Age (in years)	$5-15$	$15-25$	$25-35$	$35-45$	$45-55$	$55-65$	$65-75$
No. of deaths	$6$	$10$	$10$	$16$	$24$	$8$	$7$

Draw a less than ogive for the above data and estimate the median from it.

Q. C.I.{5-10, 10-15, 15-20, 20-25}, f {10, 12, 7, 9}- Calculate the cumulative frequency and match the following.

1. 38
2. 29
3. 22
4. 10

Q.

The times (in seconds) taken by 150

athlete to run a 110 m hurdle race are tabulated below

$\begin{array}{ccccccc}\text{Class}& 13.8-14& 14-14.2& 14.2-14.4& 14.4-14.6& 14.6-14.8& 14.8-15\\ \text{Frequency}& 2& 4& 5& 71& 48& 20\end{array}$

The number of athletes who completed the race in less than 14.6 seconds is

1. 11

2. 71

3. 82

4. 130

Q.

Following are the ages (in years) of 360 patients, getting medical treatment in a hospital:

Age (in years)	$10-20$	$20-30$	$30-40$	$40-50$	$50-60$	$60-70$
Number of patients	$90$	$60$	$50$	$80$	$50$	$30$

Construct a cumulative frequency table for the above data.

Q. Savings of Alex(fraction of total salary) over 6 months are given. Find the difference between the maximum and the minimum savings.

1. $\frac{3}{5}$

2. $\frac{1}{5}$
3. $\frac{2}{5}$
4. $\frac{4}{5}$

Q. The scores of two basket ball players A and B are plotted. Comparing the two data distributions, which of the following is a false statement?



A : B :

Q. The age of participants in a music show is plotted. Which of the following is a false statement?

1. IQR = 10
2. The distribution is skewed left
3. The distribution is skewed right
4. Median = 22