Which of the following is NOT a random variable?
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Which of the following is NOT a random variable?
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A, The heights of randomly-selected buildings in New York City |
B, The suit of a card randomly-selected from a 52-card deck. |
C. The number of children in randomly-selected households in the United States. |
D. The amount of money won (or lost) by the next person to walk out of a casino in Las Vegas. |
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- 5. When a roulette wheel is spun a ball ends up on one of the 40 numbers located on it; 19 of the numbers are black, 19 are red and 2 are green. Find the following: a. the probability that the ball lands on a green number. b. the probability that the ball lands on a number that is not red.The accompanying table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Complete parts (a) through (d) below. Click the icon to view the table. a. Find the probability of getting exactly 6 girls in 8 births. (Type an integer or a decimal. Do not round.) b. Find the probability of getting 6 or more girls in 8 births. (Type an integer or a decimal. Do not round.) c. Which probability is relevant for determining whether 6 is a significantly high number of girls in 8 births: the result from part (a) or part (b)? A. The result from part a, since it is the exact probability being asked. B. The result from part b, since it is the probability of the given or more extreme result. C. The result from part a, since it less than the probability of the given or more extreme result. D. The result from part b, since it is the complement of the result of part a. d. Is 6 a significantly high number of girls…A hand consists of 44 cards from a well-shuffled deck of 52 cards. a. Find the total number of possible 44-card poker hands. b. A blackblack flush is a 44-card hand consisting of all blackblack cards. Find the number of possible blackblack flushes. c. Find the probability of being dealt a blackblack flush.
- 4. Of the 125 million households in the U.S., 86 million of them have a pet. If you randomly survey a sample of 6 households, what are the odds that all six of them have a pet?Answer parts A, B, and C based on the following scenario. A jar has 20 marbles: 5 green, 7 blue, 8 red. A. What is the probability of randomly choosing a red marble? Answer with a simplified fraction or a percentage rounded to the nearest whole number. B. What is the probability of randomly choosing a red or a green marble? Answer with a simplified fraction or a percentage rounded to the nearest whole number. C. What is the probability of randomly choosing a red and then a green marble (keep the red marble when you choose it)? Answer with a simplified fraction or a percentage rounded to the nearest tenth.6. Purchased gum Kept the money 13 Students give 4 quarters Students given a $bill 29 11 38 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. b. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1. c. Find the probability of randomly selecting a student who kept the money, given that the student was given a $1.
- The accompanying table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Complete parts (a) through (d) below. Click the icon to view the table. C a. Find the probability of getting exactly 6 girls in 8 births. (Type an integer or a decimal. Do not round.) b. Find the probability of getting 6 or more girls in 8 births. (Type an integer or a decimal. Do not round.) c. Which probability is relevant for determining whether 6 is a significantly high number of girls in 8 births: the result from part (a) or part (b)? O A. The result from part a, since it less than the probability of the given or more extreme result. O B. The result from part a, since it is the exact probability being asked. O C. The result from part b, since it is the complement of the result of part a O D. The result from part b, since it is the probability of the given or more extreme result. d. Is 6 a significantly high number…Q1: Fourteen concrete columns had been poured and the length of the columns were (in cm): 99, 98, 96, 92, 89, 112, 107, 106, 104, 102, 101, 99, 101, 94 a. Find frequency table. b. Draw histogram and polygon. Draw cumulative frequency. d. Find the probability of a column length less than 98.5 cm. e. Find the probability of a column length equal to 93 cm. с.A bag of M&M has 6 red, 7 blue, and 2 yellow M&M's. What is the probability of randomly picking: (Round to 4 decimal places) a. A yellow? b. A blue or green? c. An orange?
- The accompanying table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Complete parts (a) through (d) below. Click the icon to view the table. a. Find the probability of getting exactly 6 girls in 8 births. (Type an integer or a decimal. Do not round.) b. Find the probability of getting 6 or more girls in 8 births. (Type an integer or a decimal. Do not round.) c. Which probability is relevant for determining whether 6 is a significantly high number of girls in 8 births: the result from part (a) or part (b)? A. The result from part b, since it is the complement of the result of part a. B. The result from part a, since it is the exact probability being asked. C. The result from part a, since it less than the probability of the given or more extreme result. D. The result from part b, since it is the probability of the given or more extreme result. d. Is 6 a significantly high number of girls…A bag contains 4 green jelly beans, 8 blue jelly beans, and 4 red jelly beans? What is the chance a student would pull a red jelly bean? A. 25% B. 50% C. 75% D. 100%Observe the question below and the two possible solutions. State which solution is correct and give a reason for your choice. For a group of 300 cars the numbers, classified by colour and country of manufacture, are shown in the table. Black Silver WhiteKorea 33 34 35Japan 23 9 24America 16 25 34Germany 19 16 32 One car is selected at random from this group. Find the probability that the selected car is a black or white car manufactured in Korea. Solution 1 P (BUW) = P (B) + P (W) = 33/300 + 35/300 = 68/300 Solution 2 P (BUW) = P (B) + P (W) = 33/102 + 35/102 = 68/102
