Refer to the accompanying data set and use the 25 home voltage measurements to c
ID: 3240911 • Letter: R
Question
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 119.5 volts, and 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. Complete the frequency distribution below. (Type integers or decimals rounded to the nearest length as needed.) Does the result appear to have a normal distribution? Why or why not? No, because the frequencies are not equal across the voltage classes. No, because the frequencies are roughly equal across the voltage classes. No, because the frequencies are randomly distributed. Yes, because the frequencies start low, reach a maximum, then become low again, and are roughly symmetric about the maximum frequency. Yes, because the frequencies are roughly equal across the voltage classes.Explanation / Answer
Note:The data is not provided. The method will be explained
The classes are (119.5 - 119.7), (119.7-119.9), (119.9-120.1), (120.1-120.3), (120.3-120.5)
The frequencies in these classes need to be found from the data.
The shape of a normal distribution follows low frequency at the start, peaks in the middle and falls to a low towards the end. It should approximately follow a symmetric shape. Therefore the middle class (119.9-120.1) should have the most frequency.
If the above mentioned patterns are followed, then the data follows a normal distribution.