alleryStart learning →Ten letter counts are 4, 5, 6, 6, 6, 7, 7, 7, 7 and 8. What is the mean?
A6.3
B6.5
C7.0
D5.9
Answer & Solution
Correct answer: A. 6.3
1. The mean is the total of the values divided by how many there are.
2. Add them in pieces: 4 plus 5 is 9.
3. The three 6s add 18, bringing the running total to 27.
4. The four 7s add 28, bringing the total to 55.
5. The final 8 brings the total to 63.
6. There are 10 values, so divide 63 by 10 to get 6.3.
7. Answering 6.5 quotes the median of the same list, not the mean.
8. Answering 7.0 quotes the mode, the value that appears most often.
_Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.6 Skewness and the Mean, Median, and Mode_
Keep practising Descriptive Statistics
Browse all Descriptive Statistics questions for CBEST, or explore more Mathematics topics.
Related questions
Key in the summary numbersFill the gaps in the center ruleLine up three of one kindTwenty-nine ages are listed in order. The position for the 70th percentile is 0.70 multiplA data set has a mean of 5 and a standard deviation of 2. Which value sits 1.5 standard deFor a set of values the mean is 6.3, the median is 6.5 and the mode is 7. Which way is theFourteen values in order are 1, 1, 2, 2, 4, 6, 6.8, 7.2, 8, 8.3, 9, 10, 10 and 11.5. What For thirteen house prices the first quartile is 308,750 and the third quartile is 649,000.