A psychologist believes that 79% of male drivers when lost continue to drive, hoping to find the location they seek rather than ask directions. To examine this belief, he took a random sample of 46 male drivers and asked each what they did when lost. If the belief is true, determine the probability that less than 70% said they continue driving.

A psychologist believes that 79% of male drivers when lost continue to drive, hoping to find the location they seek rather than ask directions. To examine this belief, he took a random sample of 46 male drivers and asked each what they did when lost. If the belief is true, determine the probability that less than 70% said they continue driving.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

In a survey of consumers aged 12 and older, respondents were asked how many cell phones were in use by the household. (No two respondents were from the same household.) Among the respondents, 202 answered "none," 289 said "one," 365 said "two," 149 said "three," and 43 responded with four or more. A survey respondent is selected at random. Find the probability that his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in use? Consider an event to be unlikely if its probability is less than or equal to 0.05. P(four or more cell phones) = (Round to three decimal places as needed.)
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 103 people in the 18-21 age bracket and finds that 87 of them respond and 16 refuse to respond. When 267 people in the 22-29 age bracket are contacted, 235 respond and 32 refuse to respond. Assume that 1 of the 370 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who responds. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol. P(22-29 or responds) =
Suzanne has injured her leg and may not be able to play in the next lacrosse game. If she can play, the coach estimates that the team will score 8 points. If she is not able to play, the coach estimates that the team will score 4 points. The doctor states there is a 40% chance that she will be able to play and a 60% chance that she will not be able to play. Determine the expected number of points that the team will scor
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys.A pollster contacts 94 people in the 18-21 age bracket and finds that 80 of them respond and 14 refuse to respond.When 285 people in the 22-29 age bracket are contacted,265 respond and 20 refuse to respond.Assume that 1 of the 379 people is randomly selected .Find the probability of getting someone in the 22-29 age bracket or someone who does not respond.Report the answer as a percent rounded to one decimal place accuracy. P(22-29 or does not respond)=
In a survey of consumers aged 12 and older, respondents were asked how many cell phones were in use by the household. (No two respondents were from the same household.) Among the respondents, 219 answered "none," 296 said "one," 370 said "two," 135 said "three," and 76 responded with four or more. A survey respondent is selected at random. Find the probability that his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in use? Consider an event to be unlikely if its probability is less than or equal to 0.05. P(four or more cell phones) = (Round to three decimal places as needed.) Is it unlikely for a household to have four or more cell phones in use? A. No, because the probability of a respondent with four or more cell phones in use is greater than 0.05. B. Yes, because the probability of a respondent with four or more cell phones in use is greater than 0.05. OC. No, because the probability of a respondent with four or…
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 95 people in the 18-21 age bracket and finds that 81 of them respond and 14 refuse to respond. When 260 people in the 22-29 age bracket are contacted, 235 respond and 25 refuse to respond. Assume that 1 of the 355 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who responds.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.P(22-29 or responds) =
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 75 people in the 18-21 age bracket and finds that 64 of them respond and 11 refuse to respond. When 290 people in the 22-29 age bracket are contacted, 274 respond and 16 refuse to respond. Assume that 1 of the 365 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who refused to respond.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.P(22-29 or refused) = %(Hint: It might be helpful to organize the data into a table first.)
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 88 people in the 18-21 age bracket and finds that 75 of them respond and 13 refuse to respond. When 292 people in the 22-29 age bracket are contacted, 270 respond and 22 refuse to respond. Assume that 1 of the 380 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who agreed to respond. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "" symbol. P(18-21 or agreed) = (Hint: It might be helpful to organize the data into a table first.)
A study by a reputable research organization found that when presented with prints from the same individual, a fingerprint expert will correctly identify the match 91% of the time. In contrast, a novice will correctly identify the match 77% of the time. Consider a sample of seven different pairs of fingerprints, where each pair is a match. Complete parts a and b below. a. What is the probability that an expert will correctly identify the match in all seven pairs of fingerprints? The probability is enter your response here. (Round to four decimal places as needed.) b. What is the probability that a novice will correctly identify the match in all seven pairs of fingerprints? The probability is enter your response here. (Round to four decimal places as needed.)
Based on a smartphone survey, assume that 50% of adults with smartphones use them in theaters. In a separate survey of 292 adults with smartphones, it is found that 142 use them in theaters. istics a. If the 50% rate is correct, find the probability of getting 142 or fewer smartphone owners who use them in theaters. b. Is the result of 142 significantly low? a. If the 50% rate is correct, the probability of getting 142 or fewer smartphone owners who use them in theaters is (Round to four decimal places as needed.) b. Is the result of 142 significantly low? vthan the probability cutoff that corresponds to a significant event, which is v because the probability of this event is 1 of 1 1 of 1 1 of oo ents ccess 0 of 1 Library 1 of 2 see Options Enter your answer in the answer box. ols ons 山TOE NOV PACES 28 1405 MacBook Air 80 000 O00 F1 F2 F3 DD F7 F4 F5 DD F6 F8 @ #3 % 2 3 2. 00 %24
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 89 people in the 18-21 age bracket and finds that 76 of them respond and 13 refuse to respond. When 271 people in the 22-29 age bracket are contacted, 249 respond and 22 refuse to respond. Assume that 1 of the 360 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who agreed to respond.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.
A gender-selection technique is designed to increase the likelihood that a baby will be a girl. In the results of the gender-selection technique, 962 births consisted of 490 baby girls and 472 baby boys. In analyzing these results, assume that boys and girls are equally likely. a. Find the probability of getting exactly 490 girls in 962 births. b. Find the probability of getting 490 or more girls in 962 births. If boys and girls are equally likely, is 490 girls in 962 births unusually high?