Mean, Median, Mode, Range
What is the mean for this data set:
2,8,9,10,15
8.8
If you roll a six-sided dice, what is the probability that you will roll an Evan number?
1/2
No- his sample only represents the football team, not the entire school
What is the probability of something that is certain?What is the probability of something that is impossible?
1
0
There is a deck of 70 flashcards and each card has a different number ranging from 1 to 70.
Find the theoretical probability of choosing an event numbered flash card
1/2
Find the Median of this data set:
0.71, 0.66, 0.63, 0.73, 0.7, 0.68, 0.66, 0.66
0.67
A spinner has four sections, 1 is blue, 2 are red, and 1 is green. Find the probability that the spinner would land on a green section. Is this spinner fair?
1/4
No, it is not fair
A supermarket conducts a survey on whether or not they should expand their organic food section. What is the population of the survey?
All of the customers
A spinner is divided into 5 equal sections. How many times is the spinner expected to land on section 3?
What is the probability that the spinner will NOT land on 3?
1/5
4/5
Find the theoretical probability of the given event when rolling a 16-sided game piece.
P(16)
1/16
Find the mode from this data set:
1,3,7,2,3,7,2,2,7,7,3,3,7,7,2,2,3,3,7
7
Twenty-five volunteers will wear one of 6 blue, 7 green, 8 yellow, and 4 red aprons during an upcoming food drive. If the aprons are assigned randomly, what is the probability that a volunteer is assigned an apron that is NOT yellow?
17/25
Researchers want to determine the percentage of Americans who visited the Statue of Liberty in New York. They decide to survey residents who live in the state of New York and they found that 80% have visited the Statue of Liberty. What was their mistake? What could they have done to fix their mistake?
They only surveyed residents in New York, while their population was everyone in the United States
They could survey people from every state
Mason plays a game by flipping two fair coins. he wins the game if both coins land facing down. If Mason plays 300 times, how many times should he expect to win?
The probability that both coins will land facing down is 1/4 (1/2 x 1/2)
1/4 x 300 = 75
he can expect them to both land facing down 75 times
What is the definition of the MAD
Mean absolute deviation
Keisha conducts a survey to determine how many siblings each of her classmates has.
Find the Mean, Median, Mode, and Range
The data is shown below
0,1,0,2,2,1,3,0,4,0,1,2
Mean: 1.333...
Median: 1
Mode: 0
Range: 4
Of all of the 25 marbles in the bag, 3 of the marbles are white.
What is the probability that a white marble will be randomly selected from the bag without looking?
Is it likely or unlikely that you will pick a white marble?
3/25 or 12%
unlikely
A population of middle school students consists of 100 boys and 250 girls. If a representative sample from this population contains 20 boys, how many girls would it contain?
Since the ratio of boys to girls is 2:5 in the population, the proportion 2/5 = 20/g can be solved
There are 50 girls for every 20 boys
The SAME number of 7th and 8th graders attended Morgans school. A student is randomly chosen to raise the flag each day. About how many times is it expected that a 7th grader will raise the flag during the next 30 days?
15 times
What is theoretical probability?
the ratio of favorable outcomes to total number of possible outcomes
A box Plot has a Q1 of 5 and a Q3 of 16
What is the IQR?
Is my data consistent or not?
11
No, the IQR is high s0 the data has more variability and is less consistent
Greg has a bag that contains 25 colored tiles. Of all of the tiles in the bag, 10 are blue. Suppose another bag contains 250 tiles. Of all of the tiles in the bag 75 are blue. From which bag is Greg LESS likely to pick a blue tile? Find the probability for both bags
The Second bag is less likely
First bag: 10/25 (4/10) or 0.4
Second bag: 75/250 (3/10) or 0.3
Maddie recently took a statistics quiz in her math class. In one question, 45 of the 900 visitors at a local craft fair were surveyed about the cost of admission to the show. Maddie incorrectly stated that the sample in the situation was 900. What was the actual sample?
the 45 who were surveyed
Richard, Lenny, Hanne, and Raquel together buy one season ticket to see a basketball team. If there are 68 games included, what is the expected amount of games that Raquel should expect to see?
17 games
If you roll a 12 sided dice, what is the probability of rolling a number less than 12? Higher than 12? An even number? Odd Number?
1
0
1/2