Assignment:
Randomly selected 50 people from New York City were asked if they use a subway to get to the work place.
Based on this sample data was made a statement that for the whole population of New York City residence 80% take subway to get to the work place.
Does this statement represent descriptive or inferential statistics?
Determine the level of measurement for the following variable:
Company Name
Systematic Sampling Technic was used to select 5 numbers between 1 and 100.
The first selected number was 7.
Complete selection:
Find the Median for the following set of data:
11, 22, 5, 7, 30
Find the Median for the following set of data:
25, 20, 8, 10, 28, 16, 22, 15
Calculate Weighted Mean for the following Data:
Value Weight
20 2
25 4
32 4
40 2
Calculate Weighted Mean for the following Data:
Value Weight
12 2
18 2
20 6
24 5
Find Quartiles for the following set of data:
4, 8, 12, 18, 20, 22, 26, 30
Calculate variance for the following sample:
(don't round during calculations)
Value
1 10
2 25
3 28
4 35
Use formula for sample variance, not population variance:
(x1-mean)2+(x2-mean)2+(x3-mean)2+(x4-mean)2 / 3
Calculate standard deviation for the following sample:
(use formula for sample, not for population when you calculate variance divide by N-1 not by N).
Value
1 22
2 24
3 28
4 31
5 35.