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What was the average (arithmetic mean) rating of the durabil
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05 Aug 2018, 02:35
05 Aug 2018, 02:35
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78% (02:16) correct
21% (02:04) wrong based on 19 sessions
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Quote:
The bar graph above shows the numbers of people who were surveyed about a car in 5 counties. The pie chart above shows the distribution of how the people in County E rated the car for durability, where each person rated the car for durability with one of the integers 1, 2, 3, 4, and 5, where 1 is the worst and 5 is the best.
What was the average (arithmetic mean) rating of the durability of the car in County E?
A. 1.25
B. 1.42
C. 2.53
D. 2.84
E. 3.00
Re: What was the average (arithmetic mean) rating of the durabil
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05 Aug 2018, 03:37
05 Aug 2018, 03:37
2
There is no need to first find the number of people who were surveyed in country E. This is because the same number of people are divided by percentage for their ratings on durability. Hence,
mean = 0.22 * 5 + 0.3* 1 + 0.18* 2 + 0.08* 4 + 0.17*3
mean = 2.84. Percentage itself represents the weight of each rating.
mean = 0.22 * 5 + 0.3* 1 + 0.18* 2 + 0.08* 4 + 0.17*3
mean = 2.84. Percentage itself represents the weight of each rating.
Re: What was the average (arithmetic mean) rating of the durabil
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05 Aug 2018, 17:38
05 Aug 2018, 17:38
amorphous wrote:
There is no need to first find the number of people who were surveyed in country E. This is because the same number of people are divided by percentage for their ratings on durability. Hence,
mean = 0.22 * 5 + 0.3* 1 + 0.18* 2 + 0.08* 4 + 0.17*3
mean = 2.84. Percentage itself represents the weight of each rating.
mean = 0.22 * 5 + 0.3* 1 + 0.18* 2 + 0.08* 4 + 0.17*3
mean = 2.84. Percentage itself represents the weight of each rating.
OH WOW! I took over 5minutes and did like each rating separately. Need to keep this in mind for next time
