CA Foundation P3 · Chapter 13 · Question 2 of 9
In a frequency distribution with inclusive classes 10–19, 20–29, 30–39, the class boundaries of the class 20–29 are:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: D) 19.5 – 29.5
Explanation
The gap between consecutive inclusive classes is 1 (e.g. 19 and 20). Half the gap, 0.5, is subtracted from the lower limit and added to the upper limit. So the boundaries are 20 − 0.5 = 19.5 and 29 + 0.5 = 29.5.
More Statistical Description of Data and Sampling MCQs
- Q4In a family budget of ₹18,000 per month, the expenditure on food is ₹4,500. In a pie chart of the budget, the angle of the food sector is:
- Q5The frequencies of five consecutive classes are 5, 8, 12, 15 and 10. The 'less than' cumulative frequency of the third class is:
- Q6The number of possible samples of size 3 that can be drawn without replacement from a population of 10 units (order not considered) is:
- Q7A sampling method in which the population is divided into homogeneous sub-groups and a random sample is drawn from each sub-group is called:
- Q8A population has a standard deviation of 12. The standard error of the sample mean for a random sample of size 36 (drawn with replacement)…