Question

It is known that the average consumption of electrical energy in a certain province is 721 Kwh.

A technology company in the region believes that its employees consume more than the provincial average. Collect information on the consumption of 15 randomly chosen employees, and obtain the following data:

710 774 814 768 823

732 675 755 770 660

654 757 736 677 797

If the distribution of monthly electricity consumption is normal:

a) Is there evidence to confirm that the average household electrical energy consumption of company employees is higher than the average consumption at the provincial level? Use a significance level of 10%.

b) What is the p-value of the decision?

Answer #1

It is known that the mean of electricity consumption in a
certain province is 721 kWh.
A technology company in the region thinks half of its employees
consume more than the provincial mean. So it collects data from 15
employees randomly chosen and obtains the following data:
710 774 814 768 823
732 675 755 770 660
654 757 736 677 797
If the distribution of the monthly consumption of electrical
energy is normal:
a) Is there evidence to say that the mean consumption of the
electrical energy of the employees is...

Table 2. The
mean response times per block for each participant that was
tested.
2f
2g
2i
2j
2e
/3
Blocks
average of
average of
average of
/6
/6
/6
/6
Participants
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
8 & 10
11 & 13
14 & 16
Difference score
t-value
p (1-tailed)
p (2-tailed)
1
749
703
776
502
745
875
811
688
833
745
557
1136
658
529
794...

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