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Refer to the accompanying data set and use the 25 home voltage measurements to construct a...

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 120.5 ​volts, and use a class width of 0.2 volt. Does the result appear to have a normal​ distribution? Why or why​ not?

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Answer #1

Answer:

The Frequency distribution is given below:

Voltage (volts) Frequency
120.5 - 120.6 2
120.7 - 120.8 6
120.9 - 121.0 10
121.1 - 121.2 5
121.3 - 121.4 2

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 and bellshaped about the maximum frequency( center of the data)

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