Day Home (volts) 1 127.3 2 127.7 3 127.4 4 127.6 5 127.8 6 127.1 7 127.5 8 127.3

Question

Day Home (volts) 1 127.3 2 127.7 3 127.4 4 127.6 5 127.8 6 127.1 7 127.5 8 127.3 9 127.4 10 127.7 11 127.4 12 127.5 13 127.4 14 127.4 15 127.6 16 127.3 17 127.3 18 127.2 19 127.5 20 127.8 21 127.7 22 127.4 23 127.3 24 127.2 25 127.4 Refer to the accompanying data set and use the 25 home voltage measurements to construct a frequency distribution with five classes. Begin with a lower class limit of 127.0 volts, and use a class width of 0.2 volt. Does the result appear to have a normal distribution? Why or why not? Click the icon to view the data. Voltage (volts) Frequency 127.0-

Explanation / Answer

The Frequency distribution is given below:

The results appear to have a normal distribution , because the frequencies of initial class interval is  low, reach a maximum at middle class interval, then become low again of ending class intervals , and are roughly symmetric about the maximum frequency( center of the data)

Voltage (volts) Frequency 127.0 - 127.1 1 127.2-127.3 7 127.4-127.5 10 127.6-127.7 5 127.8-127.9 2

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