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Probability/Statistics
Probability/Statistics
Probability/Statistics
Probability/Statistics
Probability/Statistics
100
What makes a sample biased?
What is the sample is not representative of the population
100
Francis surveyed a random sample of 70 students at Franklin High School about their favorite season. Of the students surveyed, 18 chose fall as their favorite season. There are 1816 students at Franklin High School. Based on the data, what is the most reasonable estimate for the number of students at Franklin High School whose favorite season is fall?
What is about 467
100
How are the mean and the median different?
What is the median represents the middle figure when the data is in ascending order and the mean is the average
100
Find the mean of the following data set: 45, 28, 25, 17, 30
What is 29
100
Jose is going to use a random number generator 500 times. Each time he uses it, he will get a 1, 2, 3, or 4. Complete the following statement with the best prediction. Jose will get something other than a 2...
What is about 375 times
200
Shun is going to flip a fair coin 450 times. Complete the following statement with the best prediction. The coin will land tails up...
What is about 225 times
200
Find the mean of the following data set: 12, 14, 23, 76, 26
What is 30.2
200
Define the term variability, use MAD in your definition
What is how spread out is the data, the greater the MAD, the greater the variability
200
You flip a coin two times. What is the probability of getting heads once and tails once?
What is 1/4
200
Define the term "compound event."
What is the overlap of more than one simple event.
300
Jeremy is going to roll a fair 6-sided die 180 times. What is the best prediction for the number of times that Jeremy will roll a number greater than 4?
What is 60
300
You've decided you want a plant for your room. At the gardening store, there are 4 different kinds of plants (tulip, fern, cactus, and ficus) and 4 different kinds of pots to hold the plants (clay pot, plastic pot, metal pot, and wood pot). If you randomly pick the plant and the pot, what is the probability that you won't get a clay pot or a cactus?
What is 9/16
300
Getaway Travel Agency surveyed a random sample of 45 of their clients about their vacation plans. Of the clients surveyed, 21 expected that they would go on 3 vacations in the next year. There are 516 Getaway Travel Agency clients. Based on the data, what is the most reasonable estimate for the number of Getaway Travel Agency clients who expect to go on 3 vacations in the next year?
What is about 241
300
Define "mean absolute deviation."
What is the average distance between each data value and the mean.
300
James lives in San Francisco and works in Mountain View. In the morning, he has 3 transportation options (bus, cab, or train) to work, and in the evening he has the same 3 choices for his trip home. If James randomly chooses his ride in the morning and in the evening, what is the probability that he'll take the same mode of transportation twice?
1/3
400
You're playing a game where you defend your village from an orc invasion. There are 3 characters (elf, hobbit, or human) and 5 defense tools (magic, sword, shield, slingshot, or umbrella) to pick from. If you randomly choose your character and tool, what is the probability that you'll be a magic elf?
What is 1/15
400
Find the MAD of the following data set: 12, 14, 23, 76, 26
What is 18.32
400
A fair six-sided die is rolled twice. What is the theoretical probability that the first number that comes up is less than or equal to the second number?
What is 21/36
400
You are rolling a fair six sided die twice. What is the probability that the sum of your rolls is greater than 10?
What is 3/36 or 1/12
400
You're at a clothing store that dyes your clothes while you wait. You get to pick from 4 pieces of clothing (shirt, pants, socks, or hat) and 3 colors (purple, blue, or orange). If you randomly pick the piece of clothing and the color, what is the probability that you'll end up with an orange hat?
What is 1/12
500
Angie, Bridget, Carlos, and Diego are seated at random around a square table, one person to a side. What is the theoretical probability that Angie and Carlos are seated opposite each other?
What is 1/3
500
Gabe tosses 4 coins in a game. He wins if the outcomes of his tosses have more tails or an equal number of heads. Find the probability that he will win.
What is 11/16
500
A bag contains tiles with the following digits: 2, 3, 5, and 7. Parker randomly picks a number from the bag. The three students use their numbers to create a three-digit number. Find the probability that the three digit number formed is divisible by 5.
What is 6/24 or 1/4
500
Find the MAD of the following data set: 60, 57, 31, 44, 85 You may use a calculator
What is 14.32
500
In a poll of Ms. Camara's English class, 80% of the students say that English is their favorite academic subject. Explain why this is not a valid conclusion for the entire school.
The English class is not representative of the entire school because it could be an honors class or just contain one grade of students.