CA Foundation P3 · Chapter 13 · Question 9 of 9
A systematic sample of 30 units is drawn from a numbered population of 600 units. If the first unit selected is number 7, the 12th unit selected is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: D) 227
Explanation
Sampling interval k = N/n = 600/30 = 20. The r-th unit selected is 7 + (r − 1) x 20. For r = 12: 7 + 11 x 20 = 227. Using 12 x 20 gives 247, which is the 13th unit.
More Statistical Description of Data and Sampling MCQs
- Q2In a frequency distribution with inclusive classes 10–19, 20–29, 30–39, the class boundaries of the class 20–29 are:
- Q3Which of the following graphs is used to locate the median of a frequency distribution graphically?
- 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: