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 127.6 volts, and use a class width of 0.2 volt. Does the result appear to have a normaldistribution? Why or why not? Day Home (volts)
1 127.8
2 127.7
3 128
4 128.3
5 128.5
6 127.7
7 127.6
8 127.9
9 127.7
10 128.3
11 128.1
12 128.4
13 128.1
14 127.8
15 128.3
16 128.3
17 128
18 127.9
19 127.6
20 128.5
21 128.2
22 128.4
23 128.5
24 127.8
25 128.1

answer

false

explanation

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i think the answer is true

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct