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Score(x) | 1 | 2 | 3 | 4 | 5 | 6 | |

Fre(f) | 5 | 7 | 3 | 7 | 11 | 6 | 7 |

**Find the variance of the data**

- A.
**4.69** - B.
**3.42** - C.
**4.85** - D.
**3.72**

**QUICK ANSWER…**

**D**

**SOLUTION****… **** **

**Variance = average of the squared difference between each score and the mean score.**

**Hence, variance = 171/46 = 3.72**

**Now for the right answer to the above question:**

**Option A is incorrect.****Option B is incorrect.****C is incorrect.****D is the correct answer.**

**QUICK TIPS…**

**You may please note the****se/this****:**

**Variance is the average of the square of the deviation of each score from the mean.****To calculate variance:****We firstly find the mean,****Then subtract each score from the mean, and****Then square each of the answers gotten, and****Then multiply each of the squares with the corresponding frequency, and****Then sum them up, and****Finally divide this sum with the total frequency to get the variance.**

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**/ culled from 2019 JAMB-UTME mathematics question 15 /**

##### Find the variance of the data... » QuizTablet

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