survey of 64 informed voters revealed the following information: 45 believe that Elvis is still alive 49 believe that they have been abducted by space aliens 42 believe both of these things A. How many believe neither of these things? B. How many believe Elvis is still alive but don’t believe that they have been abducted by space aliens?

survey of 64 informed voters revealed the following information: 45 believe that Elvis is still alive 49 believe that they have been abducted by space aliens 42 believe both of these things A. How many believe neither of these things? B. How many believe Elvis is still alive but don’t believe that they have been abducted by space aliens?

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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2. A multiple-choice quiz has 15 question, each with 5 possible answers of which only one is the correct answer. What is the probability that sheer guesswork yields a) from 5 to 10 correct answers? b) Exactly 2 correct answers? c) From 3 to 4 correct answers? d) At least 5 correct answers? e) At most 3 correct answers?
3. Suppose that a class contains 8 boys and 10 girls, and that 5 students are to be selected at random for a special assignment. The teacher wants at least one boy from the 5 students for this assignment. The number of ways are a. 8316 b. 42768 с. 11760 d. 997920
3. A poll done for Newsweek found that 10% of Americans have seen or sensed the presence of an angel. A contingent doubt that the percent is really that high. It conducts its own survey. Out of 85 Americans surveyed, only 5 had seen or sensed the presence of an angel. As a result of the contingent's survey, would you agree with the Newsweek poll? In complete sentences, also give three reasons why the two polls might give different results.
and 4. A department store surveyed 428 shoppers, and the following information was obtained: 214 shoppers made a purchase, and 299 were satisfied with the service they received. If 52 of those who made a purchase were not satisfied with the service, how many shoppers did the following? a. made a purchase and were satisfied with the service b. made a purchase or were satisfied with the service c. were satisfied with the service but did not make a purchase d. were not satisfied and did not make a purchase a. b. с. 8. A reg foll had an
9. There are about 8 million people in the City of New York. A survey organization took a simple random sample of 2,500 persons and found that the average household income in the sample was $59,210 and the SD was $26,120. The organization estimates the average income in the entire city to be around $59,210, they put s give-or-take number of $522.40 on this estimate. Say whether each of the following statements is true or false, and explain. (a) An approximate 99.7%-confidence interval for the average household income in the city runs from $57.642.80 to $60,777.20 (b) If a statistician takes a simple random sample of 2,500 persons out of the 8 million people in the city, and goes 3 SEs either way from the average household income of the the 2,500 people in the sample, there is about a 99.7% chance that his interval will cover the average household income in the city. (c) About 99.7% of the people in the sample had incomes in the range $59, 210+ $78,360. (d) It is estimated that 99.7% of…
5. A representative sample of 50 students from a high school is surveyed. Each student is asked what science class he or she is taking. Science Class Physics Chemistry Biology No. of Students 6. 10 18 Earth Science 4 Health Sciences 12 Select all of the statements that are valid based on the survey results. a. About 20% of students at the high school are taking Chemistry. b. About twice as many students are taking Health Science than are taking Physics. c. For every 150 students we could predict that at least 18 of the students are taking Physics. d. For every 25 students we could predict that at least 4 of the students are taking Earth Science.
B7
Concerned about graffiti, mayors of nine suburban communities instituted a citizen Community Watch program. Community Monthly Incidents After Monthly Incidents Before Burr Oak 4 4 Elgin Corners 1 2 Elm Grove 8 3 Greenburg 0 6 Huntley 7 2 North Lyman 7 1 South Lyman 4 7 Pin Oak 0 12 Victorville 7 5 Number of Graffiti Incidents Before and After Citizen Watch Program (n = 9) Suburb After Before Diff Burr Oak 4 4 0 Elgin Corners 1 2 -1 Elm Grove 8 3 5 Greenburg 0 6 -6 Huntley 7 2 5 North Lyman 7 1 6 South Lyman 4 7 -3 Pin Oak 0 12 -12 Victorville 7 5 2 (b) Find the test statistic tcalc. (A negative amount should be indicated by a minus sign. Round your answer to 2 decimal place.) (c) State the critical value tcrit for α = .05. (A negative amount should be indicated by a minus sign. Round…
15) Use the situation below to answer the question that follows. Team Jet has 7 members who won a school competition. Of these 7, 4 members are randomly picked to receive prizes for winning. The 1st member selected wins a $50 gift card; the 2nd person selected wins a $25 gift card; the 3rd person selected wins a $10 gift card; the 4th person selected wins a $5 gift card. The names of Team Jet's members are represented by the first letter of their first names, as displayed in the following table: Name Frank Gina Harriet Inez Jakob Keven Liu Letter F G H I J K L In the box below, complete the remaining three rows of the list that models how to calculate the number of possible ways 4 team members can be selected to win the prizes. 1) FGHIJKL Let Lui win the 1st prize, so select L. 2) 3) 4)