Question

.2.21 Question Help * 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 27.7 volts, and use a class width of 0.2 volt. Does the result appear to have a normal distribution? Why or why not? 囲Click the icon to view the data. 128.1-128.2 128.3-128.4 128.5-1286 10 Type integers or decimals rounded to the nearest tenth as needed.) Does the result appear to have a normal distribution? Why or why not? O A. No, because the frequencies are roughly equal across the voltage classes O B. No, because the frequencies are not equal across the voltage classes O C. No, because the frequencies are randomly distributed 0 D. Yes, because thefrequencies are roughly equal across the voltage casses ○ E. Yes, because the frequences start low, reach a manum, then become low agan, and are roughly symmetrie about me mas mum frequency. ES ook

Answer 1

E. Yes , because the frequencies started low , reaches maximum , then become low again and roughly symmetric about the maximum frequency. The reason behind the answer is that normal distribution is symmetric about its mean. The following frequency nearly show that pattern.