2. 100 college students were surveyed, and it was found out that all of them have visited at least one of thefollowing three cities: Manila (M), Pasig (P), and Quezon (Q).53 of the students visited Manila.52 of the students visited Pasig.65 of the students visited Quezon.19 of the students visited Manila and Pasig.31 of the students visited Manila and Quezon.28 of the students visited Pasig and Quezon.38 of the students visited exactly one of the following cities: Manila, Pasig, and Quezon.a.) How many students visited only Manila?b.) How many students visited all of the following cities: Manila, Pasig, and Quezon?c.) How many students visited at most two of the following three cities: Manila, Pasig, and Quezon?Venn Diagram:

Venn diagram are used to visualize the group of observations. In venn diagram, we can indicate only…

Answered: 2. 100 college students were surveyed,…

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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5. In 2006, tenis introduced a challenge system in which a player can challenge a decision as to whether a tennis ball was correctly called 'in’ or ´ouť by an official. In the 2015 U.S. Open Tennis Championship there were a total of 850 player challenges between both the Men's and Women's Singles matches. These challenges were determined either to be correct (meaning the player was correct and the umpire was incorrect) or incorrect (meaning the player was incorrect and the umpire was correct). These 850 challenges are summarized in the table below. Player Challenge Men's Women's Correct 153 72 Incorrect 394 231 (a) Calculate the proportion of all challenges that were determined to be correct. (b) Using these data as a representative sample of all player challenges in professional tennis, a 95% confidence interval for the difference in the proportion of men's and women's challenges that are determined to be correct (men – women) was found to be 0.04 ± 0.06. All conditions for inference…
5. An office manager is looking to purchase a new printer for his office. He has narrowed his choices down to four printers but cannot decide which of the four he prefers. He has decided to choose two of the four printers at random, and then to let the other members of the office decide which of the two they prefer. The speeds, in pages per minute, of the four printers are 25, 30, 27, and 32. Considering the speeds of the two printers chosen to be the sample, what are the mean and the standard deviation of the sample mean?
In a survey of 300 students of a college, it was found that 49% liked watching football, 53% liked watching hockey and 62% liked watching basketball. Also, 27% liked watching both football and hockey, 29% liked watching both basketball and hockey and 28% liked watching both football and basket ball. and 5% liked watching none of these games. a) The number of students like watching all the three games is Blank 1 b) The number of students who like watching only one of the three given games is Blank 2 c) The number of students who like watching at least two of the given games Blank 3 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer
6) A small business owner you follow on TikTok is SO EXCITED because last month, she was able to begin selling her product in a popular chain store around the nation. Her contract with the chain store says that at any time, there will be at least 20 of her products sitting out on the shelves. She wants to conduct a survey to see if that is true. She visits 5 of the local chain stores around her and records the number of products of hers that are on the shelves. She will then construct a 95% confidence interval to determine the mean number of products on the shelves for all of the stores. (a) Discuss whether this study meets the each of the conditions for constructing a confidence interval. If one of the conditions has not been met, what additional information would be required or what change in the study would you recommend? (b) If, instead of constructing a 95% confidence interval, the business owner constructed a 98% confidence interval, would the 98% interval be wider, narrower, or…
9. A group of 50 single men were asked which dating apps they had on their phones. The follo data were collected: 33 of the men had the Tinder app. 30 of the men had the Coffee Meets Bagel app. 26 of the men had the Hinge app. 16 of the men had both the Tinder and Coffee Meets Bagel apps. 14 of the men had both Tinder and Hinge apps. 18 men had both Hinge and Coffee Meets Bagel apps. 7 men had all three apps on their phones. a) Represent this information in a Venn diagram: b) Calculate the number of single men who have none of these apps on their phone. c) How many single men only had Tinder on their phone? d) How many students own at most two of the apps?
6. Among the Grade 11 students in a certain school, - belong to the Science Club, 15% belong to the Music Club, - belong to the Mathematics Club, - belong to the English Club, 5% are members of the swimming team, while the remaining 24 do not belong to any of the above co-curricular organizations. If no student belongs to more than one organization, determine the number of students who belong to each club or organization.
12. (18 pts) In a survey of 203 professional athletes, it was found that 98 of them owned a convertible, 86 of them owned a giant screen TV, and 98 owned a sporting goods store. 25 owned a convertible and a store, 36 owned a TV and a store, and 51 owned a convertible and a TV. 15 owned all three items. a. How many athletes did not own any of the three items? b. How many owned à convertible and a TV, but not a store? 36 c. How many athletes owned a convertible or a TV? d. How many athletes owned exactly one type of item in the survey? e. How many athletes owned at least one type of item in the survey? f. How many owned a TV or a store, but not a convertible?
A researcher is interested in finding a 99% confidence interval for the mean number of times per day that college students text. The study included 111 students who averaged 40.2 texts per day. The standard deviation was 22.8 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? 0 distribution. b. With 99% confidence the population mean number of texts per day is between and texts. c. If many groups of 111 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population number of texts per day and about percent will not contain the true population mean number of texts per day.
In a series of studies, Sebastian Deri and his colleagues (2017) asked multiple groups about the number of friend groups they had and how often they attended different social events. They then asked participants how they thought their own numbers compared to other people's: Did participants see themselves as less social, the same as, or more social than others? In the first study, the researchers reported that: "Three hundred four participants from Amazon's Mechanical Turk (150 women; Mage = 37.1; 78% White, 10% Black, and 6% Asian) completed a survey in exchange for modest payment" (p. 860). What do the researchers mean by "Amazon's Mechanical Turk" with respect to their sample of participants? O A. An archival data set that already exists and from which researchers can use data O B. An online tool that researchers can use to recruit people to participate in research in exchange for a small payment O C. An e-book sold by Amazon that includes contact information for possible…
2. A survey on a sample of 35 new cars being sold at a local auto dealer was conducted to see which of three popular options: Air-conditioning (A), Bluetooth (B), and Rear Camera (C), were already installed. The survey found: 18 had A, 13 had B, 12 had C, 5 had A and B, 8 had A and C, 6 had B and C, 4 had all three options. Find the number of cars that had (a) A and B but not C, (b) A and C but not B, (c) B and C but not A; (d) only one of the options; (e) at least one option; (f) exactly two options; (g) none of the options.
Suppose that 40 Malaysian Chinese are surveyed and they speak at least one of the three dialects, Cantonese, Hokkien or Hakka. It is found that 30 of them speak Cantonese, 20 speak Hokkien and 15 speak Hakka. It is also found that 3 of them speak all three dialects. How many of the surveyed Malaysian Chinese speak exactly two languages?

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