Essentials of Statistics (6th Edition)

Chapter 4

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; Finding the probability of event A. ; P(A) = ... more

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The probability of rain today is 0.25 or ¼. ; ... more

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This statement is wrong as it implies that only 60... more

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The probability would be high and very close to 1... more

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0, ⅗, 1, and 0.135. ; Probability of an event lies... more

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; Finding the probability of the correct answer... more

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; Finding the probability that your answer is ... more

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; Each birth can result in either a boy (b) or a ... more

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Out of 50 births, 47 girls appear significantly ... more

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Neither significantly low nor significantly high... more

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Neither significantly low nor significantly high... more

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Significantly low. ; Among 50 births we would ... more

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Probability of 0.5 or ½. ; There are a total of ... more

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Probability of 0.2 or ⅕ . ; There are a total of 5... more

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Probability is 0.43. ; The given percentage can be... more

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Probability is 0.292. ; The given percentage can ... more

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Probability of 0.1 or 1/10.  ; There are a total ... more

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Probability of 0.5 or ½. ; Let A be the event that... more

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Probability is 0. ; The probability of an ... more

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Probability is 1. ; The probability of a certain ... more

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.It would be a disadvantage for the employer as ... more

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. It would be a disadvantage for the candidates as... more

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.This result appears to be reasonable as an ... more

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.The result does not appear to be a reasonable ... more

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.We can conclude that the method was effective in ... more

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We can conclude that the method was effective in ... more

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The result is reasonably close to the expected ... more

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or 0.270. No, it is not unlikely for someone to ... more

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Yes, it is unlikely for a car to roll over in a ... more

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or 0.375. ; Finding the probability of exactly one... more

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or 0.375.  ; Finding the probability of exactly ... more

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or 0.25.  ; Finding the sample space for a couple ... more

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or 0.125.  ; Finding the probability of all four ... more

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Women do not have the ability to predict the ... more

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Seats belts do have an effect on survival rates... more

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There is not enough evidence to conclude that ... more

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The probability of a headache is slightly larger ... more

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represents the probability of a randomly selected ... more

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denotes the probability of getting a male adults ... more

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The events are dependent. They can be treated as ... more

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The event implies that the probability that a ... more

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0.74 or 74%.  ; Finding the probability of a ... more

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0.197. ; Finding the probability of a flight not ... more

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represents the probability of an adult answering ... more

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denotes the probability of an event in which the ... more

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or 0.676.  ; Finding the row and column totals... more

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or 0.117.  ; Finding the row and column totals... more

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or 0.912.The events are not disjoint. ; Setting up... more

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or 0.340. The events are not disjoint. ; Setting ... more

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or 0.634.  ; Defining the events and finding the ... more

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or 0.943.  ; Defining the events and finding the ... more

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0.0156. ; Finding the probabilities of the ... more

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0.00158. ; Finding the probabilities of the ... more

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or 0.92.  ; Finding the individual probabilities... more

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or 0.99.  ; Finding the individual probabilities... more

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or 0.593.  We would think that in general the ... more

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0.838. This is a high probability and hence most ... more

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0.728. This is a high probability and hence most ... more

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0.854. ; Finding the probability of a patient not ... more

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0.431. ; Setting up the events. ; The first person... more

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In general, ; Finding ; Let be the event the ... more

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Here represents the event that of the 3 phones ... more

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We assume independence of events. This is a ... more

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Here is the probability of randomly selecting a ... more

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The confusion of the inverse is to think when in ... more

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or 0.875.  ; Finding the probability of not having... more

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or 0.5.  ; Finding the required conditional ... more

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0.982. ; Finding the probability of not having any... more

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0.974. This system would ultimately only produce ... more

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0.893, the chances of being allowed to continue ... more

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0.965, the chances of getting a defect for her ... more

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0.988, the results of the study may not be true ... more

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or 0.00173. A person may now receive unnecessary ... more

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or 0.0290. A person may not then receive the ... more

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or 0.994. The test ivery effective in identifying ... more

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or 0.991. Thetest very effective in identifying ... more

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0.989. This is quite a high probability and in ... more

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0.490. This is not a low probability and surely ... more

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0.0489. This is a low probability. This implies ... more

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0.569. ; Finding the probability of not sharing a ... more

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The symbol "!" represents the factorial notation. ... more

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Combinations, since the order is not important ... more

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None of the mentioned rules as here the sampling ... more

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No, here since repetition is allowed and the order... more

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or 0.0001.  ; Counting the number of ways the ... more

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or 0.00001. ; Counting the number of ways the ... more

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or 0.00585. ; Counting the number of ways the ... more

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165, 6. ; Counting the number of ways of choosing ... more

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or 0.000025. ; Counting the number of ways of ... more

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For two additional letters we have 1352 ... more

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; Finding the number of possible routes. ; The ... more

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3,326,400. ; Counting the number of ways the ... more

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It does not seem feasible to randomly guess the ... more

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10. ; Counting the number of possible pairs. ; We ... more

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or 0.00055.  ; Counting the number of ways of ... more

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or 0.0083.  ; Counting the number of possible ... more

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; Counting the number of possible Powerball ... more

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or 0.042. ; Counting the number of possible ... more

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or 0.00001 ; Counting the number of possible zip ... more

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60,480. ; Counting the number of possible routes... more

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800 area codes. 6,400,000,000 possible phone ... more

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34,650. ; Finding the number of ways the ... more

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; Counting the number of possible playlists. ; ... more

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653,837,184,000. ; Finding the number of ways the ... more

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There is a much higher probability of getting ... more

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or 0.002. Yes, this can be a problem, because if ... more

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62 possible characters. Yes, the system is ... more

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or 0.029. ; Finding the required number of ... more

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or 0.048.Approximately 5% of hands are blackjack ... more

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26 ways. ; Counting the number of ways we can ... more

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12 ways. ; Creating a table to count the different... more

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2,095,681,645,538. ; Counting the number of ... more

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or 0.8. ; Finding the probability of a correct ... more

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0.80. ; Finding the required probability or no ... more

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or 0.334. ; Finding the required probability. ; ... more

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0.5476. ; Finding the required probability. ; It ... more

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A very small probability, say 0.0001. ; Guessing ... more

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0.0680. ; Finding the row and column totals. ;   ... more

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or 0.727. ; Finding the row and column totals... more

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or 0.00847. ; Finding the row and column totals... more

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0.00459. ; Finding the row and column totals. ;   ... more

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or 0.0131. ; Finding the row and column totals... more

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or 0.589. ; Finding the row and column totals... more

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or 0.657. ; Finding the row and column totals... more

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or 0.592. ; Finding the row and column totals... more

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or 0.832. ; Finding the row and column totals... more

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or 0.798. ; Finding the row and column totals... more

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0.347. ; Finding the required probability.  ; Let... more

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0.198. ; Finding the required probability. ; Let ... more

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is the event of randomly selecting a driver who ... more

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is the event of randomly selecting a driver who ... more

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0.171. ; Finding the required probability. ; Since... more

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This is a subjective probability and the answer ... more

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0.0335, it is not likely. ; Setting up individual ... more

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; Counting the number of ways we can select the ... more

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; Counting the number of ways we can choose two ... more

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; From the scatter plot, there does not appear to... more

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This answer is based on a simulation and can ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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; Find the row and column totals. ;   Positive ... more

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0.671 and 0.462. The first value is a true ... more

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