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Descriptive Statistics for Taking the Subway to Work in NYC

Randomly selected 50 people from New York City were asked if they use a subway to get to the work place. 40 said "Yes".
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.

Solution Preview

Question 1

Randomly selected 50 people from New York City were asked if they use a subway to get to the work place. 40 said "Yes".
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?

Solution:
Correct answer is inferential since sample data is used to make an inference about the entire population.

Question 2

Determine the level of measurement for the following variable:
Company Name

Solution:
Correct answer is Nominal since the variable is the company name.

Question ...

Solution Summary

The solution provides descriptive statistics for people who use the subway to get to their workplace in New York City.

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