Identifying Discrete Variables

  • 1.

    Jake is fascinated with gardening. He likes seeing the growth of his plants and enjoys keeping track of the number of days per week he waters his houseplants, as well as the amount of water, in ounces, he uses each time. Which of these is the discrete variable?

    Answers:

    • Types of house plants

    • Amount of water used

    • Number of days a week

    • Number of house plants + Amount of water used

  • 2.

    Alan is going fishing with his friends and they always bet money on who can catch the largest fish. They keep track of how many fish they catch and record the precise length of each fish in inches. Identify the discrete variable.

    Answers:

    • The amount of bet

    • length of fish

    • Number of fish

    • The time of day he goes fishing

  • 3.

    Ryan drives a large vehicle and keeps track of the number of times he goes to the gas station as well as a precise measurement of how much gas he buys in gallons. Which of these is the discrete variable?

    Answers:

    • Type of vehicle + Number of gallons

    • Type of vehicle he drives

    • Number of times he goes to the gas station

    • Number of gallons of gas he buys

  • 4.

    Sean wants to get in shape and is keeping track of the number of sodas he drinks and the amount in ounces consumed per week. Identify the discrete variable.

    Answers:

    • Number of sodas

    • None/Other

    • Day of the week

    • Amount in ounces

  • 5.

    Carl is a track runner. Once or twice a week, when he isn't training and has some free time, he buys new running shoes online. He wants to keep track of his money so he keeps track of the number of pairs of shoes he buys as well as the price in dollars and cents. Identify the discrete variable.

    Answers:

    • The time he goes online and makes a purchase

    • The price per pair of shoes

    • The distance he runs in miles

    • Number of pairs of shoes he purchases

  • 6.

    Ruby likes to go running regardless if it is evening or morning. She likes to bring either a sports drink or water and is keeping track of how many days she goes running a week and for how long she runs in minutes and seconds. Identify the discrete variable.

    Answers:

    • The type of drink she brings

    • The length of time she goes running

    • The number of days she goes running

    • The time of day she goes running

  • 7.

    Gary is collecting scrap pieces of lumber that were leftover at a construction site. He wants to save up enough lumber to build a shed. During random times of the day, he checks on the site and records how many usable pieces he finds as well as the precise length of each piece in inches. What is the discrete variable in this situation?

    Answers:

    • The weight of lumber he needs for the shed

    • The time of the day he goes to check the site

    • Number of pieces of wood

    • Length of each piece of wood

  • 8.

    James has a green house where he grows flowers of different types and sells them online at various prices. He waters and adds a chemical that promotes healthy growth every day. He records the number of flowers that bloom, the amount of chemical he uses in ounces, and measures the length of the petals down to each millimeter. Identify the discrete variable.

    Answers:

    • The price he sells the flowers online.

    • Length of each petal

    • The amount of chemicals he uses

    • Number of flowers

  • 9.

    Jacky got a physical exam done and is not satisfied with her current blood pressure level. She is on a fitness plan and is tracking the number of days she works out as well as the precise amount of time she works out. What is the discrete variable?

    Answers:

    • The number of days she works out

    • Her blood pressure level

    • The time she got her physical done

    • The length of her workout

  • 10.

    Darryl goes out clay skeet shooting every weekend with 3 of his friends. They make random amount bets to see who can shoot the most discs. He always keeps track of the number of clay discs he shoots and the precise amount of time he takes to shoot them in minutes and seconds. Identify the discrete variable.

    Answers:

    • The amount of time he goes clay shooting a week

    • The amount of time he takes to shoot the discs

    • The amount of his friends' bet

    • The number of clay discs

  • 11.

    A scientist is performing an experiment involving some harmful chemicals that can emit toxic fumes. He records the number of times the chemical has the reaction he wants, the time the reaction takes place in minutes and seconds, as well as the density of the fumes in pounds per square inches. What is the discrete variable?

    Answers:

    • The type of chemicals used

    • The density of the fumes

    • The number of times the chemical has a reaction

    • The time the reaction takes place

  • 12.

    Billy is trying to be more productive and wants to cut out watching useless television programs in his life. He starts keeping track of the number of times he watches television during the day, the type of program, as well as the length in minutes and seconds. What is the discrete variable in this situation?

    Answers:

    • The day of the week he watches the most television

    • The type of program he watches on television

    • Number of times he watches television a day

    • The length of television he watches a day

  • 13.

    Reggie is trying to improve his sprinting speed and his coach tells him to practice and record his results. Reggie tracks the number of sprints he does a day, the precise time he runs in minutes and seconds, as well as the type of shoe he is wearing. What is the discrete variable?

    Answers:

    • The day of the week he is practicing sprints

    • Number of sprints he does a day

    • The time he ran his sprints

    • The type of shoe he wore

  • 14.

    Jack is fixing up his car to go faster. He decides to take it out for a test and see how long before his car will reach 50 mph. He chooses to test during the night and records the number of tests he did as well as the amount of time his car took to reach 50 mph. Identify the discrete variable in this situation.

    Answers:

    • Length of time it took to reach 50 mph

    • The number of tests he did

    • Day of the week he decided to test his car

    • The time of day to test the car

  • 15.

    Stanley, an owner of a large ranch, sells quality soil to local farmers in his area. He keeps track of the number of sales he gets in a week, the amount in ounces, as well as the price he charges in dollars and cents. What is the discrete variable?

    Answers:

    • The quantity of the soil

    • The number of sales

    • The amount he charges

    • The size of the ranch

  • 16.

    Eli who is an avid chess player is trying to get his ranking higher. He attends a tournament every week and starts tracking the number of pieces he loses per game as well as the time it takes each game before someone gets checkmated in minutes and seconds. What is the discrete variable?

    Answers:

    • The time it takes each game

    • The day of the tournament

    • His current Chess ranking

    • The number of pieces he loses

  • 17.

    David really wants to pass his Statistics course this year. He notices that he keeps getting distracted with alerts from his phone which causes him to digress. He develops a studying strategy and begins keeping track of the number of alerts he gets during the time he spends studying which he also records in minutes and seconds. What is the discrete variable?

    Answers:

    • None

    • The Statistics course

    • The number of alerts

    • The time he spends studying

  • 18.

    Jaime would like to improve her running distance for this years track team and is collecting data on her runs. She randomly chooses days to go running. She records the number of songs she listens to on her mp3 player as well as the precise distance she ran in miles and feet and the time in minutes and seconds. What is the discrete variable?

    Answers:

    • The number of songs she listens to

    • The distance she runs

    • The amount of time she uses for running

    • The day she chooses to go running

  • 19.

    Sarah has to do a large project due soon which involves creating graphs. She sometimes uses her laptop and other days she uses her desktop. She doesn't want to spend a lot of time and decides to see how long on average a graph will take her to do. Sarah enjoys drinking lemonade while she works on her craft. She works diligently for 2 hours and records the number of graphs she completed as well as the amount of lemonade she drank in ounces. What is the discreet variable in this scenario?

    Answers:

    • The time her project is due

    • The type of computer she used

    • The amount of lemonade she drank

    • The number of graphs completed

  • 20.

    Raymond weighs 145 lbs and is trying to gain strength. He wants to build a significant amount of muscle by the end of the month and has decided to start a fitness plan. He has decided to workout 3 times a week and randomly choose the days he will go and workout. He records how many pushups he completes in a session as well as the precise amount of time he spends working out. Identify the discreet variable.

    Answers:

    • The days of the week he will work out

    • The length of the workout

    • The amount of muscle he gains

    • The number of pushups he does

  • 21.

    Shirley has not done laundry in over a month. She spends a Sunday washing all of her clothes. She decides to record the number of loads it will take as well as the amount of detergent she uses in milliliters. What is the discreet variable in this situation?

    Answers:

    • The day of the week she did laundry

    • The number of loads all of her clothes took to wash

    • The amount of time she refrained from doing laundry

    • The amount of detergent she used

  • 22.

    William wants to purchase a new mp3 player but is not sure how much memory he needs. He decides to perform an experiment using his old mp3 player. He organizes them by genre and records the number of tracks that fits in it as well as the precise amount of time for all tracks in hours and minutes. What is the discreet variable?

    Answers:

    • The amount of memory he will need

    • The number of tracks

    • The total amount of time for all tracks

    • The type of genre

  • 23.

    Lauren is majoring in statistics and is also a cashier at a grocery store. She decides to record some data about her customers for a project. Lauren works randomly about 4 days a week and each day she records the total amount spent by each customer in dollars and cents as well as the number of customers that comes through her check-out line. Identify the discreet variable.

    Answers:

    • The day of the week

    • The total amount spent by her customers

    • The number of customers

    • Lauren's major in school

  • 24.

    Quinn, an electrician, is currently paid hourly and is looking for a promotion so that he can get a standard salary. He decides to try and save his company some money. He starts recording the precise length of wire he uses in feet and inches as well as the number of outlets he installs. He has 5 large projects he needs to get done by the end of the month and will take data for all 5 projects. What is the discreet variable?

    Answers:

    • The length of wire

    • The number of outlets

    • The amount he gets paid hourly

    • The type of promotion he will receive

  • 25.

    Nancy is a striving sports analyst and her favorite sport is soccer. On Sundays, she enjoys watching games while sipping on some wine. Nancy always gathers data on the games she observed. She records the number of goals she sees throughout the day, the precise time it takes to make each goal, and the amount of wine she drinks in ounces. What is the discreet variable?

    Answers:

    • The day of the soccer games

    • The amount of wine she drank

    • The time it takes to score a goal

    • The number of goals

  • 26.

    Bobby loves to play checkers. He wants to become a champion before he is 15 and begins taking data on his games. He keeps track of the following: the number of kings he makes in a game, the precise time in minutes and seconds it takes him to win a game, and whether he was black or red in the game. Identify the discreet variable.

    Answers:

    • His age before becoming champion

    • The number of kings he makes in a game

    • The time it took for him to win

    • The color of his checker pieces

  • 27.

    Rachel goes to the beach every Saturday. She enjoys sunbathing and drawing pictures while she is there. She begins keeping track of the following: the temperature in degrees Celsius, the number of drawings she completed, as well as the amount of time she was there in minutes and seconds. What is the discreet variable?

    Answers:

    • The number of drawings

    • The temperature

    • The time she spent sunbathing

    • The day of the week she goes to the beach

  • 28.

    Ricky is tight with his money. He wants new clothes and is planning on purchasing them by using his newly acquired credit card. He goes to the mall and keeps track of the number of items he purchased, the item's price in dollars and cents, as well as the time he spent shopping for each item in minutes and seconds. What is the discreet variable?

    Answers:

    • The day he went to the mall

    • The number of items he purchased

    • The length of time he spent shopping

    • The price per item

  • 29.

    Vicky is a cab driver and likes to do statistics on the side. She drives 5 times a week and each day she records the number of passengers she had, their destination, and the time they spent on each ride in minutes and seconds, as well as the total amount spent in dollars and cents. What is the discreet variable?

    Answers:

    • The passenger's destination

    • The number of passengers she had

    • The amount each passenger paid

    • The time spent on each ride

  • 30.

    Carl wants to improve his bike riding skills. He randomly chooses days he will go bike riding and he goes for 10 miles each ride. He starts keeping track of the number of other bike riders he sees as well as the amount of time he spends riding in minutes and seconds. Identify the discreet variable.

    Answers:

    • The day that he decides to go for a bike ride

    • The length of each bike ride

    • The time spent on each bike ride

    • The number of other bike riders

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