Small-business failures. A study of the survival of small businesses chose anSRS from

Chapter 0, Problem 20.37

(choose chapter or problem)

Small-business failures. A study of the survival of small businesses chose anSRS from the telephone directorys Yellow Pages listings of food-and-drinkbusinesses in 12 counties in central Indiana. For various reasons, the study got noresponse from 45% of the businesses chosen. Interviews were completed with148 businesses. Three years later, 22 of these businesses had failed.21(a) Give a 95% confidence interval for the percent of all small businesses in thisclass that fail within three years.(b) Based on the results of this study, how large a sample would you need toreduce the margin of error to 0.04?(c) The authors hope that their findings describe the population of all smallbusinesses. What about the study makes this unlikely? What population do youthink the study findings describe?20.38 Customer satisfaction. An automobile