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

Day   Home (volts)
1   126.2
2   126.6
3   126.5
4   126.6
5   126.6
6   126.0
7   126.5
8   126.3
9   126.5
10   126.6
11   126.5
12   126.1
13   126.5
14   126.4
15   126.6
16   126.3
17   126.3
18   126.2
19   126.4
20   126.9
21   126.7
22   126.4
23   126.3
24   126.3
25   126.5

Complete the frequency distribution below.

Voltage​ (volts)	Frequency
126.0126.0minus−nothing	nothing
nothingminus−nothing	nothing
nothingminus−nothing	nothing
nothingminus−nothing	nothing
nothingminus−nothing	nothing

​(Type integers or decimals rounded to the nearest tenth as​ needed.)

Does the result appear to have a normal​ distribution? Why or why​ not?

A.

No comma because the frequencies are roughly equal across theNo, because the frequencies are roughly equal across the

voltagevoltage

classes.classes.

B.

​Yes, because the frequencies are roughly equal across the voltage classes.                                              

C.

Yes comma because the frequencies start low comma reach a maximum comma then become low again commaYes, because the frequencies start low, reach a maximum, then become low again,

and are roughly symmetricand are roughly symmetric

about the maximum frequency.about the maximum frequency.

D.

​No, because the frequencies are not equal across the voltage classes.                           

E.

​No, because the frequencies are randomly distributed.

Click to select your answer(s).