Vocabulary
a randomly selected group chosen for the purpose of collecting data.
What is a sample
A school principal wants to see which subject the 526 students in his school liked best.
Which represents a sample?
A. all the students in the school
B. The students in 3rd grade.
C. The first 90 students who come into the school
D. The students making a B in math.
What is C. The first 90 students who come into the school.
Two integers that are opposites.
What is Additive inverse?
2/5
.4
75 + (-10.2)
-2.7
A number that summarizes a sample.
What is a statistic.
A gaming website wanted to find out which console its visitors owned. Which choice best represents a sample?
A. All of the website visitors.
B. Visitors over 24
C. Visitors with an 'e' in their user name.
D. Visitors to the 3Ds section.
What is C
Visitors with an 'e' in their user name
A decimal in which 1 or more digits repeat.
What is a repeating Decimal?
5/8
.625
6-(-7)
13
A number that summarizes an entire population.
What is a parameter.
A survey company was trying to see if people in a state thought the pollution was too high. Which choice best represents a population?
A. Every person who owns more than 3 cars.
B. Every person in the state.
C. A selection of people from each neighborhood in the state.
D. A selection of people who live in small towns.
What is B
Every person in the state.
The line placed over the digits that repeat.
What is Bar notation?
1/2
.50
-4.5-5.4
-9.9
The entire group of items or individuals from which the samples under consideration are taken.
What is population?
A restaurant chain wanted to find out how the customer experience was in a store. Which choice best represents a population?
A. Every 23 customer
B. 255 customers who filled out complaint cards.
C. All of the people who ate at the store.
D. 243 customers who spent more than $11.
What is C
All of the people who ate at the store.
A decimal with a repeating digit of 0
What is a terminating decimal?
Han's got a score of 19 on his math test. There was a total of 20 Questions. What is the equivalent decimal form of the fraction?
19/20, 0.95
Last season, Isabella's greatest score while bowling was 48 points above her average. Her least score was 35 points below her average. What is the difference between her greatest and least scores?
83 points
An equation stating that two ratios or rates are equivalent.
What is a proportion?
A musician wanted to see what people who bought his last album thought about the songs. Which choice best represents a sample?
A. Every person from ages 5-12 who bought the album.
B. Every person who bought the album.
C. 279 girls who bought the album.
D. A selection of 8,724 people who bought the album.
What is D
A selection of 8,724 people who bought the album.
A whole number and it's opposite.
What is an Integer?
A basketball team had 25 home games last season. of those tickets were completely sold out for 15 of the games. What fraction represents the number of home games that were sell-outs? What is the equivalent decimal form of the fraction?
15/25, 0.6
A classmate states that 14 - (-27) = -13. What error did they make and what is the actual value?
The classmate subtracted -27 from 14 instead of adding the opposite. Actual value is 41.