Which of the following statements denote a random variable?
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Which of the following statements denote a random variable?
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A, It is a hypothetical list of the possible outcomes of a random phenomenon. |
B, Its value is a numerical outcome associated with a random phenomenon. |
|
C. It is any phenomenon in which outcomes are equally likely. |
D. It is any number that doesn't change. |
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- 6. State yes/no in each part, and explain in a sentence or two. a. You have a drawer filled with 20 balls, which are colored black or white. You have 12 black and 8 white balls. You randomly select a ball, record the color, and put the ball back into the drawer. Then you go to randomly select another from the drawer. Is the probability that the second pick is white independent of what the first ball color was? b. You have a box containing 52 cards, which are either red or black. You have 26 red cards and 26 black cards. You randomly select a card (do not put it back in the box). Then you go to randomly select another card. Is the probability that the second pick is red independent of what the first card was? c. A basketball player is going to do a free throw 100 times at practice. They are interested in the number of goals they make (each throw is either a goal or not). If each free throw attempt is independent with a 90% chance (0.90 probability) of being a goal, then is the total…2. Employees of a company were asked to rate the nation's economy and their political party. TTT Republican Democrat Independent 2. 23 26 18 Excellent Good Not So Good 11 28 3 Poor 9. a. Find the probability an employee said good. b. Find the probability an employee said the Green party. c. Find the probability an employee said Republican and excellent d. Find the probability an employee said Independent or not so good. e. Find the probability an employee said excellent or poor. f. Find the probability a Democrat employee said good.ALL OF MY ANSWERS HAVE BEEN INCORRECT. 72% of all Americans are home owners. If 49 Americans are randomly selected, find the probability thata. Exactly 36 of them are are home owners. b. At most 33 of them are are home owners. c. At least 32 of them are home owners. d. Between 32 and 40 (including 32 and 40) of them are home owners.
- Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among141 subjects with positive test results, there are 23 false positive results; among 154 negative results, there are 44 false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is ?Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 146 subjects with positive test results, there are 25 false positive results; among 151 negative results, there are 5 false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.)Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 149 subjects with positive test results, there are 24 false positive results; among 155 negative results, there are 4 false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.) Enter your answer in the answer box. 9:35 PM 2/28/2021 P Type here to search కాు PoDn End PrtScn Home F9 FIO DII 米 F2 F6 F5 F4 Esc F3 & %23 2$ % @ 7 8. 3 4 R Y H
- There are 7 councilors in the Ames City council. Three of them are female. Suppose they need to select two councilors for a committee. Which expression is computing the probability that if both councilors are selected at random, both will be female? a. None of the other answers is correct. b. 2C3 / 2C7 c. 3/7 d. None of the other answers is correct. e. 3C2 / 7C2 f. 3C2 / 7C3Which of the following values cannot be probabilities? 0, 5/3, 3/5, 1, - 0.53, 1.16, 0.01, 2 Select all the values that cannot be probabilities. OA. 2 O B. - 0.53 O C. 0 O D. 0.01 O E. 3 F. 1.16 O G. 1 H. 5Assume that A and B are events. If P(AUB) = 0.7, P(A) = 0.4, and P(B) = 0.55, find P(ANB). P(ANB) = (Simplify your answer. Type an integer or a decimal.)
- This question40Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 142 subjects with positive test results, there are 23 false positive results; among 150 negative results, there are 3 false negative results. i one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.)
