Which font? Plain type fonts such as Times New Roman are easier to read thanfancy fonts

Chapter 0, Problem 20.30

(choose chapter or problem)

Which font? Plain type fonts such as Times New Roman are easier to read thanfancy fonts such as Gigi. A group of 25 volunteer subjects read the same text inboth fonts. (This is a matched pairs design. One-sample procedures forproportions, like those for means, are used to analyze data from matched pairsdesigns.) Of the 25 subjects, 17 said that they preferred Times New Roman forWeb use. But 20 said that Gigi was more attractive.17(a) Because the subjects were volunteers, conclusions from this sample can bechallenged. Show that the sample size condition for the large-sample confidenceinterval is not met, but that the condition for the plus four interval is met.(b) Give a 95% confidence interval for the proportion of all adults who preferTimes New Roman for Web use. Give a 90% confidence interval for theproportion of all adults who think Gigi is more attractive.