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Mean, Median and Mode · Question 24 of 67

Twenty diners rated a new restaurant on a scale of 1 to 5.

Question 24

EasyOriginal question
RatingNumber of diners
12
23
35
46
54

Twenty diners rated a new restaurant on a scale of 1 to 5. What is the mean rating?

Options for question 24

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. ∑fx=2+6+15+24+20=67\sum fx = 2 + 6 + 15 + 24 + 20 = 67.

  2. Mean = 6720=3.35\frac{67}{20} = 3.35.

Worth noting

3 is the average of the five possible ratings, ignoring the frequencies. 3.5 is the median and 4 the mode.

Concept
Weighted mean from a frequency table
Typical time
40 s
Your time
—
The rule this testsFrequency tables
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