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100

What are the 5 kinds of Samples?

Simple, Stratified, and Systematic Random Samples

Convenience Sample

Voluntary Response 

100

X/3 = 27/9

x=9

100

If 3 out of 4 students like gum, estimate how many students would like gum in a class of 28 kids

21 students

100

What does the middle line of a box plot represent?

The Median

100

5x-3=17

X = 4

200

This type of Sample is when members are selected EVERY NTH person/thing

Systematic Random Sample

200

x/9 = 15/45

x=3

200

60% of adults say they like going to bed early. In a room of 130 adults, how many like to go to bed early?

78 Adults

200
What is the name given to the length of the Box in a box plot?

Interquartile Range

200

There is a 14% tax to pay on auto parts. How much tax would you pay on a set of tires that cost $800?

$112

300

What makes a sample a Voluntary Response sample?

When it is optional to do, such as when it is on paper or in text format (online).

300

12/x = 8/24

x=36

300

A scientist is trying to estimate how many bears live in the mountains. She tags 40 bears, then over the next few months she takes samples of the population and finds on average, 2 out of 10 bears have tags on them. Estimate how many bears live in the mountain.

200 Bears

300

What is the mean of this Dot Plot? Round to the nearest tenth. (Picture 4.3)

6

300

4(-x+3)=36

x = -6

400

This type of sample is when members of a population are divided up into groups then randomly selected from those groups

Stratified Random Sample

400

A recipe calls for 2 cups of sugar for every 3 cups of flour. How much Sugar is needed for 7.5 cups of flour?

5 cups of sugar

400

A researcher wants to find out the prevalence of falcons in her small town. She puts tags on 50 of them, then studies over the next few months how many tags/falcons she sees. She finds that roughly 1 out of every 200 falcons have a tag on them. About how many falcons live in her town?

10000 Falcons

400
When comparing two box plots, if one box plot has a smaller box than the other, what does that mean?

Its data is more consistent

400

A store marks up all of its prices by 35%. If a tub of margarine cost $4.95, how much does it cost now?

$6.68

500

Describe a Convenience Sample

A sample where the method of sampling is done the easiest way possible. 


Examples include picking the first X number of people, picking people right infront of you (such as your 3rd Period Math Class), or picking specific members of a population.
500

If 5 kg of grapes cost $15, how much does 13kg of grapes cost?

$39.00

500

A Biologist wants to know how many worms live in his backyard. He (arguably inhumanely) colors 300 of them with crayons. After months of monitoring, he finds he only colored about 5% of the worms. How many worms are there total?

6000 Worms

500

A box plot is segmented into sections (separated by what are called Quartiles). How much of the data does each section represent, no matter the size of it?

25% of the data per section

500
-3(2x-2)+9x=39

x = 11

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