An administrator at a large high school was interested in the types of school-sponsoredextracurricular activities in which students participated: only academic clubs, only intramural sportsclubs, both type of clubs, or neither. The responses from a survey of 500 students selected at randomare summarized in the frequency table below, shown by class standing.1st year2nd year3rdyear4thyearTotalOnly Academics30406060190Only Sports35302020105Both25155550Neither7055255155Total16014011090500If the school assumes extracurricular participation is independent of class standing, which of thefollowing expressions could be used to calculate the expected number of respondents who do notparticipate in any academic or intramural activities during their 4th year at the school?(5)(155)(A)500(90)(155)(B)500@@(E)90155

The objective of the question is to find the expected number of 4th year students who do not…

Answered: An administrator at a large high school…

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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In marketing children’s products, it is extremely important to produce television commercials that hold the attention of the children who view them. A psychologist hired by a marketing research firm wants to determine whether differences in attention span exist among advertisements for different types of products. A number of children under 10 years of age are asked to watch one 60-second commercial for one of three types of products, and their attention spans are measured in seconds. The results are shown in the accompanying table: Type of Product Advertised Toys/Games Food/Candy Children’s Clothing 42 55 30 45 58 35 48 52 42 40 60 32 50 57 38 b). What type of error is possible and describe this error in terms of the problem.
To determine if people's preference in dogs had changed in the recent years, organizers of a local dog show asked people who attended the show to indicate which breed was their favorite. This information was compiled by dog breed and gender of the people who responded. The table summarizes the responses. Female Male Total 73 59 132 49 47 96 Yorkshire Terrier Dachshund Golden Retriever Labrador Dalmatian 58 33 91 37 41 78 45 28 73 86 67 153 Other breeds Total 348 275 623 Does a person's gender appear to be independent of what dog breed they like most? Explain your answer. @ 2 W S X a BIUA-A-LEEE 12pt # 3 e d C C $ 4 r f V % 5 t 9 A 6 b y h & 7 n O u * 8 m O k Paragraph Y ( 9 ✓ O alt 1 ) O P 4 ctrl fr ? 1 D Next } U 1 ( backs
The results of a survey of 150 students about the type of movie they prefer are shown in the two-way frequency table. Complete the table. How many boys were surveyed? Preferred Movie Type Gender Comedy Drama Science Fiction Total Girl 23 35 14 72 Boy 31 13 34 78 Total 54 48 48 150 boys were surveyed.
A large group of workers is divided into three departments: those who work in special operations, those who work on the main floor, and those who work in management. Strep throat has been going around and a health inspector would like to know if there is a relationship between department and having strep throat. She selects a random sample of 100 workers and classifies each one according to their department and whether they have strep throat. The data are displayed in the table. The health inspector would like to know if these data provide convincing evidence that the distribution of strep throat status differs across the departments in the population of all workers of this large company. What is the appropriate inference procedure? chi-square test for goodness of fit because the data come from one random sample chi-square test for homogeneity because the data come from independent random samples chi-square test for association/independence because the data come from one random…
For a normally distributed variable X with mean 40 and standard deviation 1O, what is the probability that X equals exactly 30? In notation, what is P(X = 30) ? O 0.841 O 0.242 O 0.159
A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below. Age Group Watch11 p.m. News? 18 or less 19 to 35 36 to 54 55 or Older Total Yes 37 46 59 83 225 No 213 204 191 167 775 Total 250 250 250 250 1,000 (a) Let p1, p2, p3, and p4 be the proportions of all viewers in each age group who watch the station’s 11 p.m. news. If these proportions are equal, then whether a viewer watches the station’s 11 p.m. news is independent of the viewer’s age group. Therefore, we can test the null hypothesis H0 that p1, p2, p3, and p4 are equal by carrying out a chi-square test for independence. Perform this test by setting α = .05. (Round your answer to 3 decimal places.)…
A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below. Age Group Watch11 p.m. News? 18 or less 19 to 35 36 to 54 55 or Older Total Yes 49 59 61 84 253 No 201 191 189 166 747 Total 250 250 250 250 1,000 (a) Let p1, p2, p3, and p4 be the proportions of all viewers in each age group who watch the station’s 11 p.m. news. If these proportions are equal, then whether a viewer watches the station’s 11 p.m. news is independent of the viewer’s age group. Therefore, we can test the null hypothesis H0 that p1, p2, p3, and p4 are equal by carrying out a chi-square test for independence. Perform this test by setting α = .05. (Round your answer to 3 decimal places.)…
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A magazine identified the following five "maintenance" activities often performed by people as summer approaches; 1. Prep the car for road trips; 2. Clean up the house or apartment; 3. Groom the garden; 4. Exercise the body; 5. Organize the wardrobe. The following data are the responses of 30 people who were asked, on June 1st, how many of the five they had accomplished. Complete parts (a) through (c) below. Click the icon to view the data. 0 O A. Frequency 1 2 3 4 5 14 6 13% 10% 7% 3% (b) Construct a histogram. Choose the correct graph below. 15- 12- 4 3 2 1 0 1 2 3 4 5 Activities Performed 47% 20% Q O B. Frequency 오오오오오오 0 1 2 3 4 5 Activities Performed Q Q Frequency SNSSO 15- Data Table 0 1 2 3 4 5 Activities Performed 1 4 3 0 0 1 Q 0 0 2 Print 0 1 4 1 3 0 Frequency 2 0 0 Full data set 0 0 2 1 20 300 5 0 1 Done 0 1 2 3 4 5 Activities Performed Q
3. The director of library services at Fairmont College did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 4217 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area % Books in Circ Library on this Subject No. of Books in the Sample on this Subject Business 32% 1210 Humanities 25% 956 Natural Science 20% 940 Social Science 15% 814 Other Subject 8% 297 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students.
Thirty randomly selected students were asked how many self- help books they have read in the last three years. Their responses are in the following frequency table.

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