(b) The manufacturer of Stay-White toothpaste claims that by the addition of a certainchemical he can guarantee that over a given period of time, people will have lessdental decay if they clean their teeth regularly with Stay-White, than if they cleantheir teeth with ordinary toothpaste. To test this theory, free tubes of Stay-Whitewere given to 150 children at a school dental clinic, and at the same time, free tubesof ordinary toothpaste were given to a further 100 children at the clinic. All thechildren guaranteed to clean their teeth regularly for 6 months and then return for acheck-up.At the end of 6 months, it was found that 32 children using Stay-White had dentaldecay, whereas 72 children using the ordinary toothpaste had no dental decay.(i)(ii)State the appropriate assumptions.Do these data provide enough evidence to support the claim? Use α = 0.02. Question 4(a) A company is planning to market a new cereal with one of two possible packagedesigns: design A, 5-color without cartoons and design B, 3-color with cartoons. Todetermine which has the most appeal, seven stores are supplied with all two packagedesigns. All packages are priced the same, so that if any design outsells the others, itwill be due primarily to visual attractiveness. The cereal is on the market for severalmonths, and the number of sales for each design at each store is recorded.DesignABTotalΣΣΥi-1 j-1(i)(ii)111110021123102120105 114207= 177,402Store4140127234 26759894192 221State the assumptions.Perform an appropriate statistical analysis at a =67110129111 105234= 0.10.Total8107561,566

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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

Problem 1P

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