Statisticshard · Past Paper
Find the Q1 of a continuous series where N=100, lower limit of Q1 class is 10, h=10, f=20, and cf=15.
A15
B12.5
C17.5
D20
✓ Correct Answer: A — 15
Q1 = L + [(N/4 - cf)/f]*h = 10 + [(25 - 15)/20]*10 = 10 + (10/20)*10 = 10 + 5 = 15.
Share this question
More from Statistics
- If the mean of a group of observations is 50, and later it's discovered that an observation of 60 was misread as 40, what will happen to the mean after correction?
- Convert 54 degrees of a pie chart into percentage.
- If a coin is tossed 4 times, what is the total number of outcomes?
- Find the median for the frequency distribution: Marks: 10, 20, 30; Frequency: 2, 5, 3.
- If a card is drawn from a deck, what is the probability it is either a King or a Queen?