2. A company surveyed 1000 women on their age and the number of abayas purchased annually. The results of the poll are shown in the table. 0 1 3 or more Total Under 18 70 64 210 12-18 17 54 154 55 280 19-25 39 57 133 51 280 Over 2s 59 69 21 230 81 Total 115 262 432 191 1000 A women is selected at random. Use the table to answer these questions. (a) What is the probability that the women, who is over 18, purchases 2 pairs of abayas annually? (b) What is the probability that a women who purchased less than 3 pairs of abayas each year will be in the age group 12-18? 76

2. A company surveyed 1000 women on their age and the number of abayas purchased annually. The results of the poll are shown in the table. 0 1 3 or more Total Under 18 70 64 210 12-18 17 54 154 55 280 19-25 39 57 133 51 280 Over 2s 59 69 21 230 81 Total 115 262 432 191 1000 A women is selected at random. Use the table to answer these questions. (a) What is the probability that the women, who is over 18, purchases 2 pairs of abayas annually? (b) What is the probability that a women who purchased less than 3 pairs of abayas each year will be in the age group 12-18? 76

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...

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Organ Donors USA Today provided information about a survey of 5100 adult Internet users. Of the respondents, 2346 said they are willing to donate organs after death. In this survey conducted for Donate Life America, 100 adults were surveyed in each state and the District of Columbia, and results were weighted to account for the different state population sizes. a. What percentage of respondents said that they are willing to donate organs after death? b. Based on the poll results, what is the probability of randomly selecting an adult who is willing to donate organs after death? c. What term is used to describe the sampling method of randomly selecting 100 adults from each state and the District of Columbia?
a. The table below show the proportion of men and women who plan to vote in the next election. Three hundred men and 300 women were randomly selected and asked whether they planned to vote in the next election. men women plan to vote 170 185 do not plan to vote 130 115 What is the relative risk (likelihood) that men will vote versus men will not vote? a.1.567 b. 1.308 c. 0.583 d. 1.433 e. 0.764 b. During a poll, 115 people were randomly selected and asked their political party affiliation. The contingency table below shows the results cross-classified by political party affiliation and sex. Democrat Republican other total male 16 23 25 64 female 28 12 11 51 total 44 35 35 115 Find the conditional distribution of Republicans who are men. a. 0.557 b. 0.657 c. 0.20 d. 0.359 e. 0.25 c. For the given sample data and null hypothesis, compute the value of the test statistic. The claim is that the…
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age 60 Number of Customers 69 97 90 50 61 58 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.) a. What is the probability that the customer is at least 20 but no older than 49? b. What is the probability that the customer is either older than 39 or younger than 20? c. What is the probability that the customer is at least 50?
below. Freshmen Sophomores Total Male 20 18 38 Female 10 14 24 Total 30 32 62 If a student is selected at random from this sample, find the following probabilities. a. The probability of selecting a female freshman b. The probability of selecting a female or a sophomore c. The probability of selecting a sophomore, given that the student is a male
1. Based on the table that is attached below, what is the probability that a randomly selected man resident is a smoker? 0.571 0.70 0.40 0.90
7. Giving a test to a group of students, the grades and gender are summarized below. If one student was chosen at random, find the probability that the student was female. Total Male 8. 18 13 39 Female 10 4 12 26 Total 18 22 25 65 8. The table below shows the number of credit cards owned by a group of individuals. If one person was chosen at random, find the probability that the person had no credit cards. Zero One Two or more Total Male 5 19 33 Female 18 10 20 48 Total 27 15 39 81
3. A survey of a sample of 637 people is conducted. The survey's respondents are classified according to percent of income devoted to housing cost and residence type. The results are given in the table below. Apartment Duplex Single Family Total 20% 47 18 81 146 Total 220 85 332 637 When answering the following questions, please round your answers to one decimal place. What is the probability that a randomly selected person from the survey: a. spends 10-20% of their income on housing? b. lives in a single-family residence or spends more than 20% of their income on housing?
8) Given the following table with eye color and hair color for a sample of 592 people... Black hair Brown hair Blond hair 16 10 Red hair Total Green eyes Hazel eyes Blue eyes Brown eyes Total 29 14 14 15 54 84 119 20 17 26 94 68 a) What percent of people with brown hair have blue eyes? b) What is the probability someone with green or hazel eyes has red hair? 102 F Par 99+
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The table below summarizes a survey involving the relationship between living arrangements and grade point average for a group of students. If a student is selected randomly from this group, what is the probability that the student lives off campus? On Campus At home Apartment Totals Below 2.5 97 38 44 179 2.5 to 3.5 66 26 22 114 Over 3.5 18 5 8 31 Totals 181 69 74 324