This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Probability Models – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Probability Models Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why might a probability model based on observed data be non-uniform? A) It's random every time. B) It doesn't use real data. C) All outcomes are equally likely. D) Some outcomes occur more frequently than others. Show Answer Correct Answer: D) Some outcomes occur more frequently than others. 2. In compound probability, if one event does not affect the other event or events, it is referred to as- A) Theoretical probability. B) Independent probability. C) Experimental probability. D) Dependent probability. Show Answer Correct Answer: B) Independent probability. 3. In a class of 30 students, 18 are girls and 12 are boys. If a student is selected at random, what is the probability that the student is a girl? A) $\frac{3}{5}$. B) $\frac{2}{5}$. C) $\frac{1}{2}$. D) $\frac{4}{5}$. Show Answer Correct Answer: A) $\frac{3}{5}$. 4. A geometric probability model follows a Bernoulli trial and: A) Has a set sample size n. B) Is looking for first success. C) All the above. D) None of the above. Show Answer Correct Answer: B) Is looking for first success. 5. A marketing survey compiled data on the number of cars in households. If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution:X 0 1 2 3 4 5 P(X) 0.24 0.37 0.20 0.11 0.05 0.03What is the probability that a randomly chosen household has at least two cars? A) 0.20. B) 0.29. C) 0.39. D) 0.61. Show Answer Correct Answer: C) 0.39. 6. 1 out of 8 frogs has a certain genetic trait. A scientist collects a dozen frogs and wants to know the probability that 3 or 4 will have the trait. A) 18%. B) 17%. C) 13%. D) None of the above. Show Answer Correct Answer: B) 17%. 7. In a certain town, 90% of the people drive without ever looking at their phones.In a group of 200 randomly selected citizens, what is the number of people expected to be driving without looking at their phone? A) 90. B) 180. C) 110. D) 20. Show Answer Correct Answer: B) 180. 8. If I flip a coin 10 times, how many times should I get heads? A) 1. B) 10. C) 3. D) 5. Show Answer Correct Answer: D) 5. 9. The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than "A" ? A) 2/7. B) 5/49. C) 5/7. D) 10/49. Show Answer Correct Answer: C) 5/7. 10. A customer's daily lunch spending (in dollars) over 10 days is shown:\{45, 47, 48, 49, 50, 50, 50, 51, 55, 55\} The mean daily spending is 50.The standard deviation is 3. How many data values fall within one standard deviation of the mean? A) $7$. B) 7 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $7$. 11. Probability can be between what two numbers? A) 10 and 20. B) 0 and 100. C) 0 and 1. D) All Numbers are possible. Show Answer Correct Answer: C) 0 and 1. 12. A spinner is an example of a simulation tool. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. A marksman has 80% accuracy hitting targets at 1, 000 yards. What is the probability that he will make at least 4 of his next 5 shots? A) 0.032. B) 0.4096. C) 0.1369. D) 0.7373. Show Answer Correct Answer: D) 0.7373. 14. Why is it important to have equal chances in making decisions? A) Having equal chances in making decisions helps everyone be treated fairly and stops unfair preferences. B) Equal chances in making decisions are not important. C) Having equal chances actually makes decisions more unfair. D) Equal chances in making decisions only help some people, not everyone. Show Answer Correct Answer: A) Having equal chances in making decisions helps everyone be treated fairly and stops unfair preferences. 15. 1 out of every 8 frogs has a certain genetic trait. A scientist collects a dozen frogs. What is the probability that at least 2 frogs have the trait? A) 45%. B) 82%. C) 100%. D) None of the above. Show Answer Correct Answer: A) 45%. 16. What is a compound event? A) A single outcome from a trial. B) Two or more outcomes happening together. C) An experiment with one possible result. D) A lucky guess. Show Answer Correct Answer: B) Two or more outcomes happening together. 17. When rolling a single die, the events of rolling an even number and rolling a '5' are mutually exclusive. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. What happens to the shape of a sampling distribution of sample means as n increases? A) It becomes narrower and bimodal. B) It becomes narrower and more normal. C) It becomes wider and skewed right. D) It becomes wider and more normal. Show Answer Correct Answer: B) It becomes narrower and more normal. 19. A basketball player makes a free throw 60% of the time. She takes 5 shots. What is the probability she makes exactly 3 shots? Use the Desmos Binomial Probability Calculator. A) 0.23. B) 0.35. C) 0.60. D) 0.78. Show Answer Correct Answer: B) 0.35. 20. Find the probability of achieving success with the event:Flipping a coin and getting heads three times in a row. A) 1/2. B) 1/4. C) 1/8. D) 1/16. Show Answer Correct Answer: C) 1/8. 21. What is the probability of an event that is certain to happen? A) 0 (zero probability). B) 0.5 (fifty percent probability). C) 1 (one or 100% probability). D) 0.75 (seventy-five percent probability). Show Answer Correct Answer: C) 1 (one or 100% probability). 22. Can you provide an example of an application of uniform probability in real life? A) Rolling a fair six-sided die. B) Flipping a biased coin. C) Drawing a card from a deck with missing cards. D) Predicting the weather with a broken thermometer. Show Answer Correct Answer: A) Rolling a fair six-sided die. 23. A fair roulette wheel has six equal sections numbered from 1 to 6. Event C is getting a 1 and then an even number on a second spin. What is the probability of event C? HINT:This is a compound event. A) 1/6. B) 1/2. C) 1/12. D) 1/8. Show Answer Correct Answer: C) 1/12. 24. What are the numbers in a set called? A) Options. B) Elements. C) Parts. D) None of the above. Show Answer Correct Answer: B) Elements. 25. A group of students working together on a project want to randomly choose who has to complete each of the 15 activities for the project. If there are 6 students in the group, describe a model that they could use to simulate choosing who should complete each activity. A) Rolling a number cube 15 times. B) Spinning a spinner with 15 sections 6 times. C) Flipping a coin 15 times. D) Drawing 6 marbles from a bag containing 15 black marbles. Show Answer Correct Answer: A) Rolling a number cube 15 times. ← PreviousNext →Related QuizzesGrammar QuizzesProbability Models Quiz 1Probability Models Quiz 2Probability Models Quiz 3Probability Models Quiz 5Probability Models Quiz 6Probability Models Quiz 7Probability Models Quiz 8Probability Models Quiz 9Case Marking QuizCase System QuizFunctional Grammar QuizIdeational Metafunction QuizInterpersonal Metafunction QuizLexical Grammar QuizLexical Relations QuizLexical Resource QuizLexical Semantics QuizMaterial Processes QuizMental Processes QuizMorphology QuizNoun Phrase Structure QuizProcess Types QuizReciprocal Trigonometric Functions QuizSemantic Fields QuizSystemic Functional Linguistics QuizTransitivity System QuizUnderstanding Connotations QuizVerbal Functions QuizVerbal Group Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books