Fractions/Decimals/
Percents
Percents
1/2 as a decimal
What is 0.5?
When a sampling method doesn’t fairly represent a whole population, skewing the data
What is invalid/biased
The variable (letter) representing unit rate
What is K?
A percent portion of a bill that is added onto the bill to pay the waiter
What is tip
The likelihood/chance of something happening
What is probability?
93% as a decimal
What is 0.93
A sampling method is that is random and represents the entire population equally
What is valid/unbiased
Another term we use that means the same thing as “constant of proportionality”
What is “unit rate”
The percent of goals that are scored if a player attempts 15 shots and makes 12 of them.
What is 80%
The chance of landing on heads when flipping a coin
What is 50/50, 50%, 1/2, and/or 0.5
0.07 as a percent?
A survey method where every member of the population has an equal chance of being selected
What is simple random
What is 115 pages
The total amount I will pay at the counter if I buy a board game for $15 when there is a 7% sales tax.
What is $16.05
Tiny's Tattoo Parlor sold 400 tattoos this month. The probability of a customer getting an arm tattoo if 64 of those tattoos were arm tattoos (in decimal form)
What is 0.16
3/8 as a percent?
What is 37.5%?
If I survey the school by questioning every 4th person that walks in the front door, I am using this sampling method
What is stratified random sample
How many miles I can walk in 1 hour if I can walk 8 miles in 4 hours
What is 2 miles
The interest (in dollars) a bank account would gain if $5,000 was deposited for 3 years with a 4.2% interest rate.
What is $630
The relative frequency of pulling a blue marble in a bag that has 25 green, 15 red, and 5 blue marbles
What is 5/45 OR 1/9
0.67 as a fraction
What is 67/100
A grocery store manager offers double coupons to anyone who completes a survey. After the survey they determine that customers are very satisfied with their experience in the store. Is this a biased or unbiased survey?
What is biased survey
The unit rate in miles per hour of someone who can walk 0.9 miles in 30 minutes
What is 1.8
The original price of a pair of headphones if they cost $36 after a 40% discount has been applied.
What is $60
The winter clothing drive has received donations of 5 coats, 23 pairs of gloves, 19 scarves, and 3 hats so far. Based on this data, this is a reasonable estimate of the probability that the next donation is not a pair of gloves?
What is 22/45, 0.49, 49%