Show:
Central Measures of Tendencies/Matrices
Sampling Techniques
Simulations and Random Numbers
Predicting from Survey Results
Theoretical and Experimental Probability
100
What five things make up a box and whisker plot?
What is Minimum, Q2, Median, Q3, and Maximum
100
8. A company executive wants to know what percentage of her employees drive to work. Which of these methods would provide her with a simple random sample? F. Choose the first 10 employees that arrive at the office. G. Choose all employees with last names that begins with “A” H. Assign a number to each employee and then use a random number generator to select employees. J. Select one department at random and the survey all employees in that department
What is H?
100
Marcel is selling used cars. He predicts that 25% of the cars on the lot are blue. He wants to know the probability that he will walk by a blue car. Which of the following could be used to simulate the situation? A. Roll a number cube once. Let the numbers 1 – 5 represent a blue car and number six represent another color. B. Spin a spinner with four equal sections. Let each section’s color represent a car color, blue, green, black and red. C. Flip a coin 4 four times and have heads equal a blue car. D. Randomly draw a marble from a bag containing 6 blue, 7 yellow and 5 green.
What is B?
100
Out of a random sample of 700 discs, 28 are defective. Estimate the number of defective discs in a batch of 12,000.
What is 48?
100
A company manufactures CD players. The quality control department checks 600 CD players and discovers that 12 of them are defective. What is the probability that a CD player is not defective?
What is .98 or 588/600?
200
Tim's scores are listed below: 19, 23, 67, 23, 56, 12, 33, 34 What is the median?
What is 28?
200
The 12th-grade class is conducting a survey to determine music preferences for the spring dance. The class decides to survey the first 150 students that enter the school on Monday. Which of these best describes why this type of sampling may give biased results? A. The sample size is too small. B. Students are randomly selected. C. Not all students have the same chance to be surveyed. D. Every other student entering the school should be surveyed.
What is C?
200
6. Which simulation would be used to simulate the spinning a spinner containing 6 equal sectors, 32 times? F. spinning the spinner 32 times G. rolling a 6-sided die 32 times H. tossing a coin 32 times J. drawing 32 cards from a standard deck of cards
What is G?
200
Out of a random sample of 370 apples, 29 are rated “AAA.” Estimate the number of apples that would be rated “AAA” in a crop of 72,000 apples.
What is 5643 apples?
200
Mrs. Jenkins has 7 keys for her school on her key ring. All of the keys are different but look alike. One of these keys is for the bathroom and two are for her classroom. If she picks one key at random, what is the probability that the key is not for the bathroom or her classroom?
What is 4/7?
300
The exam scores for Unit 1 are listed below. 80 90 100 80 80 70 70 10 Which measure of central tendency ( mean, median, mode, or range) is the best for the given situation?
What is median?
300
A car company wants to know the three most important features of cars to licensed driver in Maryland. The marketing team contacted 100 Prince George’s County licensed drivers. Which of these is the sample in their survey? A. all licensed drivers in Maryland B. all residents of Maryland C. all licensed drivers in Prince George’s County D. all residents of Prince George’s County
What is C?
300
Myles is a member of the baseball team. He averages 3 hits for every 6 times at bat. Myles might get a hit his next time at bat. Which of these methods could not be used to simulate this situation? G. Flip a fair coin once. Let heads represent a hit and let tails represent not getting a hit. H. Use a random number generator. Let 1 and 5 represent a hit and let 2, 3, and 4 represent not getting a hit. J. Spin a spinner with 10 equally-sized sections. Let 5 sections represent getting a hit and let 5 sections represent not getting a hit. K. Draw a marble from a bag that contains 8 red and 8 blue marbles. Let a red marble represent getting a hit and let a blue marble represent not getting a hit.
What is H?
300
A library is trying to estimate how many of its 50,000 books will be need to be replaced. The librarian selects 75 books at random and finds that 9 of them are damaged and should be replaced. Which of these is the best estimate for the total number of books that will need to be replaced?
What is 6000?
300
What is the theoretical probability of rolling an even number on a number cube?
What is 3/6 or 1/2?
400
The favorite color of students in the class are given below: G G G B B B R Y R Y Which measure of central tendency ( mean, median, mode, or range) is the best for the given situation?
What is mode?
400
Fred wants to determine the mean hourly wage of the working students at his school. He asks thirty of his friends their hourly wage and calculates the sample mean to be $6. Which of these statements must be true? F. The sample was selected randomly. G. Bias was present in the selection process. H. The sample was representative of the population. J. The mean hourly wage of the working students at Fred's school was $6.
What is G?
400
A goalie saves 1/3 of the attempted shots on goal. Suppose there were 16 attempted shots in a game. Can a 6-sided number cube be used to simulate the attempted shots in one game? If so, how?
What is let 1,2 represent making and 3,4,5,6 represent not making it?
400
Ms. Emerson did a survey and determined that of her 75 students, 5 students favorite subject is math. If there are 300 students in the school, how many would you predict that math is their favorite subject?
What is 20?
400
Tim draws a marble from a bag of 40 marbles and pulls red 20 times, yellow 3 times, blue 7 times and green 10 times. What is the probability of drawing a blue or green marble>
What is 17/40?
500
Look at the data set below: 23, 19, 17, 22 What number can you add to the data so that its range is 10?
What is 13 or 27?
500
A school wants to conduct a survey of its 1200 students to decide on a school song. Based on the principles of simple random sampling, which of these is the best method for the school to use to conduct its survey? A. Assign a different number to each student who has been at the school for at least one year and select 30 students using a random number generator. B. Assign a different number to each student whose age is 16 years or older and select 30 students using a random number generator. C. Assign a different number to each student, and select 15 males and 12 females using a random number generator. D. Assign a different number to each student, and select 30 students using a random number generator.
What is D?
500
A paper cup is dropped 6 times from a height. It landed on its base 3 times. If this experiment is simulated with random numbers 0-9, how many digits should represent the cup landing on its base?
What is 5 times?
500
A pharmaceutical company is testing the effectiveness of a new medicine. The company tests the medicine on a random sample of 20 patients. Four of the patients show improvement. If 1,000 patients try the medicine, how many would be expected to show improvement?
What is 200?
500
What is the difference between experimental and theoretical probability?
What is experimental is when you actual perform/experiment and theoretical is based on theory?