Answer:
Question 1:
Quesion 2:
- <u>Percent of empolyees that worked for the company for at least 10 years = 73.3%</u>
Explanation:
Start by presenting the row data neatly for better understanding.
Employee NumberYears Worked
1 8
2 13
3 15
4 3
5 13
6 28
7 4
8 12
9 4
10 26
11 29
12 3
13 10
14 3
15 17
16 13
17 15
18 15
19 23
20 13
21 12
22 1
23 14
24 14
25 17
26 16
27 7
28 27
29 18
30 24
<u><em>Question 1. Population mean for the number of years worked, </em></u>
You just must add all the numbers on the column of Number of Years Worked and divide by the number of employes:
- Total of the column Number of Years = 417
- mean = 417 / 30 = 139/10 = 13.1 ≈ 13 years/employee
<u><em>Question 2. Percent of the employees worked for the company for at least 10 years</em></u>
You should order the column of Number of Years either by increasing or decreasing order.
The list in increasing order of number of years worked is: 1, 3, 3, 3, 4, 4, 7, 8, 10, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 15, 16, 17, 17, 18, 23, 24, 26, 27, 28, 29.
Note that that means that:
- 1 employee worked 1 year,
- 3 employees worked 3 years,
- 2 employees worked 4 years,
- 1 employee worked 7 years,
- 1 employee worked 8 years,
- 1 employee worked 10 years,
- 2 employees worked for 12 years,
- 4 employees worked for 13 years,
- 2 employees worked for 14 years,
- 3 employees worked for 15 years,
- 1 employee worked for 16 years,
- 2 employees worked for 17 years,
- 1 employee worked for 18 years,
- 1 employee worked for 23 years,
- 1 employee worked for 24 years,
- 1 employee worked for 26 years,
- 1 employee worked for 27 years,
- 1 employee worked for 28 years, and
- 1 employee worked for 29 years.
The number of employees that worked for the company for at least 10 years is 1 + 2 + 4 + 2 + 3 + 1 + 2 + 7 = 22.
The percent is:
- % = (number of employees that worked for 10 years or more / number of employees)×100
