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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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