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WE: Business Development (Energy and Utilities)
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The bar graph below displays the number of temperature readi [#permalink]
29 Aug 2018, 16:32
Question Stats:
100% (00:59) correct
0% (00:00) wrong based on 3 sessions
The bar graph below displays the number of temperature readings at each value from a sample, measured in degrees Fahrenheit. What was the average (arithmetic mean) temperature reading? Attachment:
Capture.PNG [ 48.81 KiB | Viewed 443 times ]
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Re: The bar graph below displays the number of temperature readi [#permalink]
10 Sep 2018, 09:32
You can just write 0, 1, 2, 3, 4, 5 instead of 110, 111 ...
Total: 4+3+4+1+2+2 = 16 days Sum: 0*4 + 1*3 + 2*4 + 3*1 + 4*2 + 5*2 = 32
Average: sum/total 32/16 = 2. So, the answer is 112
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Re: The bar graph below displays the number of temperature readi [#permalink]
15 Oct 2018, 11:24
This is a weighted average problem. Do not simply average 110, 111, 112, 113, 114, and 115. Instead, take into account how many times each number appears. The chart is really another way of writing: 110, 110, 110, 110 111, 111, 111 112, 112, 112, 112 113 114, 114 115, 115 In other words, the average temperature reading is really an average of 16 numbers. The easiest way to do this is: (110*4+111*3+112*4+113*1+114*2+115*2)/16 = 112 Use the calculator—the correct answer is 112.
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Re: The bar graph below displays the number of temperature readi
[#permalink]
15 Oct 2018, 11:24
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