Tabulation, frequency distribution, bar/histogram, central tendencies MCQs

Q1. Pooja recorded the daily number of buses leaving a dairy farm, getting 28, 30, 9, 36, 26, 3, 36 (buses). What is the arithmetic mean of these 7 values?

• A.28
• B.168
• C.19.5
• D.24

Answer: D. 24

Sum = 28+30+9+36+26+3+36 = 168. Mean = sum / number of observations = 168/7 = 24.

Q2. Karan noted the runs scored by Karan in 8 innings, getting 16, 39, 7, 2, 29, 26, 23, 4 (runs). What is the arithmetic mean of these 8 values?

• A.20.5
• B.146
• C.18.25
• D.20.86

Answer: C. 18.25

Sum = 16+39+7+2+29+26+23+4 = 146. Mean = sum / number of observations = 146/8 = 18.25.

Q3. Meena measured the heights (in cm) of 7 saplings in a dairy farm, getting 12, 21, 5, 33, 11, 20, 28 (cm). What is the arithmetic mean of these 7 values?

• A.130
• B.19
• C.18.57
• D.21.67

Answer: C. 18.57

Sum = 12+21+5+33+11+20+28 = 130. Mean = sum / number of observations = 130/7 = 18.57.