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Vocabulary
Populations & Samples
Random Sampling and Population Inferences
Measures of Center
Measures of Variability
100

What does IQR stand for AND what are the four steps to finding it?

Interquartile Range

1. Order the data from least to greatest

2. Find the median

3. Find the median of the lower and upper quartiles

4. Subtract the upper and lower quartiles

100

Does this describe the population or the sample?

The median cost of electricity in the US is $104 per month. 

Population

100

Is the following situation considered a random sample if the population is 7th graders?

I select every third student as they get off the bus in the morning. 

This is not a random sample. (Not all seventh graders ride the bus. 

100

What is the median of the following set of numbers? 24, 22, 20, 26, 25

24

100

What is the median and the interquartile range of the following data?

9, 7, 13, 14, 4, 2, 4

Median: 7

IQR: 9

200

What does MAD stand for and what are the 4 steps to finding it?

Mean Absolute Deviation

1. calculate the mean

2. find the difference between each piece of data and the mean

3. Find the absolute value of each deviation

4. Find the mean of the absolute deviations

200

Based on the 2010 Census Bureau, 71% of children under 18 live with two parents. 

Population

200

Is the following situation considered a random sample if the population is teachers?

Any teacher that eats lunch during 6th period is asked the survey. 

This is not a random sample. (Not all teachers can eat lunch during 6th period.)

200

What is the mean of the following set of numbers? 

10, 12, 10, 8

10

200

What is the mean absolute deviation of the following set of data?

3, 2, 4, 2, 5, 6, 2

MAD: 1.3

300

In order for a sample to be random, everyone in the population must have an _______ ________.

equal chance

300

A poll of 43 town residents showed that 32% were tired all of the time. 

Sample

300

According to a random sample of 40 students, 6 students chose they like math the best. If there are actually 350 students at the school, how many are expected to like math the best?

about 53 students

300

What is the median AND mean of the following set of numbers?

12, 8, 4, 15

Median = 10

Mean = 9.75

300

FREEBIE: What is my middle name?

Marie 

400

Define mean AND median.

mean = average

median = middle