Results from a survey of urban traffic are summarized in the table below showing the number of carsallocated to each of four categories of average speed.Average speed (mph)3.2030405012316856Number of cars86In a subsequent survey the speeds of 24 independent cars were measured. Among those 24 cars:a) What is the expected number of cars that would be allocated to an average speed less than 30 mph?b) What is the probability that exactly 15 cars would be allocated to an average speed less than 30mph?c) What is the probability that at least 7 cars would be allocated to an average speed less than 30mph?

Answered: Image /qna-images/answer/1928b2ad-7f43-4d4d-a7ac-df337bb15e03.jpg

Answered: Results from a survey of urban traffic…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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According to government data, 73% of employed women have never been married. Rounding to 4 decimal places, if 15 employed women are randomly selected: a. What is the probability that exactly 2 of them have never been married? b. That at most 2 of them have never been married? c. That at least 13 of them have been married?
Calculate the expected frequencies from the following table. Police Good Police Not total job good job Not afraid fo =45 fo =15 60 Somewhat unafraid fo =36 fo =34 70 Somewhat afraid fo =16 fo =29 45 Afraid fo =22 fo =32 54 Column Total 119 110
Given the following data for an imaginary superhero universe: Flying Telepathy Super Strength Female 70 75 56 Male 6 98 54 What is the empirical probability that a randomly selected female superhero will have telepathy? Answer in decimal form. Round to 3 decimal places as needed.
All students in a high school were surveyed about two sports. The results are shown in the graph. Frequency 600 400 200 0 190 Sports Survey 565 Basketball 340 Football Like Basketball or Football Both 100 Neither a) How many students were surveyed? b) What is the probability that a student (chosen at random) likes only basketball? Express your answer as a decimal, rounded to 2 decimal places. c) What is the probability that a student (chosen at random) likes both basketball and football? Express your answer as a percentage. d) What is the probability that a student (chosen at random) likes neither basketball nor football? Express your answer as a fraction in lowest terms.
A consumer magazine wants to compare lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each time and records the lifetimes (in minutes) in the table below. Do the data indicate that there is a difference in the mean lifetime for the three brands of ballpoint pens? Brand 1 Brand 2 Brand 3 260 181 238 218 240 257 184 162 241 219 218 213
Construct all random samples consisting two observations from the given data. You are asked to guess the average weight of the six watermelons by taking a random sample without replacement from the population. Watermelon A, B, C, D, E, and F has a weight (in pounds) 19,14,15,9,10 and 17 respectively.a. What is the probability of getting 10.00 as a mean?b. How many possible outcomes?c. What is the probability of getting 11.50 as a mean?d. What is the mean of the sampling distribution of the sample means?e. What is the population mean?
Data was collected for 224 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number of Guests Frequency 120 – 124 23 125 – 129 32 130 – 134 97 135 – 139 56 140 – 144 16 What is the class width for this GFDT?
The highway speeds of 100 cars are summarized in the frequency distribution below. Find the estimated mean speed. Speed (mph) 30-39 40-49 50-59 60-69 70-79 Cars 3. 16 50 18 13 O A. 59.5 mph O B. 62.4 mph O C. 22.8 mph O D. 56.7 mph
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+
All students in a high school were surveyed about two sports. The results are shown in the graph. Frequency 600 400 200 0 190 Sports Survey 565 Basketball 340 Football Like Basketball or Football Both 100 Neither a) How many students were surveyed? b) What is the probability that a student (chosen at random) likes only basketball? Express your answer as a decimal, rounded to 2 decimal places. c) What is the probability that a student (chosen at random) likes both basketball and football? Express your answer as a percentage. d) What is the probability that a student (chosen at random) likes neither basketball nor football? Express your answer as a fraction in lowest terms.
The following table gives data on the marital status of women aged 25 to 29. These proportions tell us the probability of the marital status of a randomly selected woman. Marital Status Never Married Married Widowed Divorced Proportion ??? 0.494 0.005 0.046 1) What percentage of women aged 25 to 29 have never been married? 2) What is the probability that a randomly chosen woman is not currently married?
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

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