Please solve this problem related to null hypothesis . I will give you good reviews.

As utility company supervisor you have been monitoring the voltage fluctuations from various

supply grid locations via the remote sensors.In the past, the mean supply grid voltage was 130

V with some noticeable degree of fluctuations (Standard Deviation= 30V) where the targe

voltage for the household loads should lie between 100-140 V.The utility company has

recently switched to a new sophisticated electricity service provider which claims that voltage

fluctuations would be reduced.

You have been assigned to ensure that the new service is more stable.

The data in the table (see appendix) gives voltage readings at various supply grid locations.

1.

Describe and organize your data and present all findings of a descriptive nature (Part 1

and 2 submissions)

2.

Using an appropriate level of significance, conduct a formal hypothesis test to

determine whether the utility company's claims are valid (For Part 2 submission only)

3.

Make a recommendation based on your findings (For Part 2 submission only)

.

Note: You must attach relevant calculations for any statistics generated manually or by a

statistical software at the back of your report.

Data

106.9

128.0

87.0

93.4

138.0

132.0

123.4

112.6

166.9

94.0

87.8

103.5

96.2

88.8

93.2

144.5

99.4

135.9

104.5

106.3

61.9

123.6

160.7

128.2

104.3

89.5

94.2

69.5

105.1

130.1

108.5

101.3

119.3

87.2

100.0

104.7

109.7

93.9

114.5

119.5

95.1

142.4

84.7

112.4

106.6

123.5

112.0

123.8

87.2

128.5