Illustration 19.21. In a sample of 400 oranges from a large co-signment 40 fruits were considered defective. Estimate the % of defective oranges assign limits within whichthe % will probably lie?in the whole consignment and

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than one percentage point? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. b) Assume that a recent survey suggests that about88%of computers use a new operating system. c) Does the additional survey information from part (b) have much of an effect on the sample size that is required?
A marketing manager samples 150 people and finds that 87 of them have made a purchase on the internet within the past month. a) Estimate the proportion of people who have made a purchase on the internet within the past month, and find the uncertainty in the estimate. b) Estimate the number of people who must be sampled to reduce the uncertainty to 0.03.
2. In a recent survey, a poll was conducted on twitter to know the stands of the youth on the (#FixtheCountry Ghana) and #Kumepr3ko. Users where asked if they are willing to participate in a demonstration. The results for the survey is summarize below: #hashtag Sample size Willing to join #FixtheCountry Ghana #Kumepr3ko 721 277 895 100 a. Estimate the true proportion P2 of all the people who are willing to go on the Kumepr3ko demonstration and obtain a 95% confidence interval for P2 b. Can you tell that people are willing to go on the kumepr3ko demonstration than that of the #FixtheCountryGhana. Use a=0,01.
1. The total number of Corona cases in the US, please keep in mind it is a running total. Courtesy of worldometers.info Date in 2020 Feb. 15 Day ( Number of Corona Cases (C) 1 15 Feb. 26 12 68 Mar. 8 23 541 Mar. 19 34 14,896 171,655 517,100 Mar. 30 45 Apr10. Apr. 21 May 2 May 13 May 24 June 4 56 67 835,559 1,170,301 1,443,627 78 89 100 1,704,112 1,942,737 111 June 15 122 2,187,774 June 26 133 July 7 July 18 2,556,718 3,109,759 144 155 3,849,089 July 29 Aug. 9 Aug. 20 Aug. 31 166 4,588,252 177 5,228,738 5,771,205 188 199 6,239,373 Sept. 11 Sept. 22 210 6,673,451 221 7,109,730 a. Let C be the total number of Corona Virus cases in the United States by the end of the r days since Feruary 14, 2020. (Let r = 0 represent Feb. 15, 2020.) Create a scatter plot of the data. Take up the entire piece of graph paper. Make sure to label the axes, and title your graph. Does it look linear? Exponential, Quadratic? c. Use the calculator to find the regression equation for this data. Express the…
1) In a survey of 1200 workers, 35% said they eat at home during a typical work week. A) What is the margin of error? B) Give an interval that is likely to contain the exact percent of all workers who eat at home. C) What number of workers responded that they eat at home during a typical work week?
1)
7,453,465 7,518,997 7,78& sed by 4.6% and total visitor days by 4.4% in thi increased slightly, from 11.6% to 12.6% of the to as the margin of error for total visitors is 7.5% ar ce: http://www.pc.gc.ca/eng/docs/bib-lib/docs5hi.aspxRE interval for total visitors in 2006.
A ski resort pays its part-time seasonal employees on an hourly basis. At a certain mountain, the hourly rates have a norma distribution with o = $8.00. If 29 percent of all part-time seasonal employees make more than $16.94 an hour, what is the average hourly pay rate at th mountain? (Round your answer to 2 declmal places.) Average hourly pay rate
An island has 12 fur seal rookeries (breeding places). To estimate the fur seal pup population in Rookery A, 4746 fur seal pups were tagged in early August. In late August, a sample of 500 pups was observed, and 182 of these were found to have been previously tagged. Use a proportion to estimate the total number of fur seal pups in Rookery A. the estimated total number of fur seal pups in Rookery A is________
The following pie chart represents the population distribution in Amman. Knowing that the population in North regions equal 2,600,200 and the population percentage in central regions is 12%, determine the population in the South? North Region 34% Central Region South Region https://exams.meu.edu jo/mod/ ENG 4) E DELL
A report says that the average amount of time a 10-year-old American child spends playing outdoors per day is between 20.5 and 25.66 minutes. What is the margin of error in this report?

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a sample of 400 oranges from a large con signment 40 fruits were considered defective. Estimate the % of defec- tive oranges in the whole consignment and assign limits within which the %% will probably lie?