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ari File Edit iew History Bookmarks Window Help STA2023 STATISTICS O N L N E BORIVOJE DJOK?C 593056 VALENTINA ESPINOSA I 7/15/187:30 PM Homework: Section 2-2 HW Save ES Score: 0 of 1 pt 1 9 of 13 (5 complete) HW Score: 34.62%, 4.5 of 13 pts 2.2.21 Question Help * Refer to the accompanying data set and use the 25 home voltage measurements to construct a trequency distribution with five classes. Begin with a lowar lass limit of 120.8 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. Complete the frequency distribution below. Voltage (volts) Frequency 120.8-121 121-121.2 121.2-121.4 121.4-121.6 121.6-121.8 10 (Type integers or decimals rounded to the nearest tenth as needed.) Enter your answer in the edit fields and then click Check Answer. Check Answer Clear All ge measurements a lower class 25 home volta the accompanying data set and use ucta freauency distribution with five classes Beai

Explanation / Answer

there are five classes

120.8 + 0.2 = 121

then from 121 to 121.02

everytime we need to 0.2 and we get the required classes

120.8-121

121-121.2

121.2-121.4

121.4-121.6

121.6-121.8

Now, it is clear from the frequency distribution table that the maximum frequency is given for the center class i.e. 3rd class has maximum frequency, then class 2nd and 4th has equal frequency of 5 each and class 1st & class 5th almost similar frequency

so, data represents a normal frequency distribution where mean, mode and median fall within 3rd class.

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