Respuesta :
population mean = (7+8+6+6+6+4+4+1+2+7+6+1+1+1+3+3+5+4+5+7) / 20 = 87/20 = 4.35 <==
sample mean = (4+5+7) / 3 = 16/3 = 5.33 <==
sample mean = (4+5+7) / 3 = 16/3 = 5.33 <==
Answer:
- The population mean is 4.35.
- The sample mean is 5.33.
Step-by-step explanation:
We are given a table as follows:
Year(x) Number of Dropouts(y)
1 7
2 8
3 6
4 6
5 6
6 4
7 4
8 1
9 2
10 7
11 6
12 1
13 1
14 1
15 3
16 3
17 5
18 4
19 5
20 7
∑ y= 87
The mean of the population is:
[tex]Population\ Mean=\dfrac{\sum y}{20}\\\\\\Population\ Mean=\dfrac{87}{20}\\\\\\Population\ Mean=4.35[/tex]
- Now, the sample is:
Year(x) Number of Dropouts(y)
18 4
19 5
20 7
Now, sample mean is:
[tex]Sample\ Mean=\dfrac{4+5+7}{3}\\\\\\Sample\ Mean=\dfrac{16}{3}\\\\\\Sample\ Mean=5.33[/tex]