llalliles of companies manufacturing spark plugs. A total of 312 companies located in the continen- tal United States are found in the register. How should this finding impact the final sample size of the survey? 10-13. Here are some numbers you can use to sharpen your computational skills for sample size determination. Crest toothpaste is reviewing plans for its annual survey of toothpaste purchasers. With each case that follows, calculate the sample size pertaining to the key variable under consideration. Where informa- tion is missing, provide reasonable assumptions. iability share nown switched last year Acceptable Error 4% 5% 5% Confidence Level 95% 99% 95% llalliles of companies manufacturing spark plugs. A total of 312 companies located in the continen- tal United States are found in the register. How should this finding impact the final sample size of the survey? 10-13. Here are some numbers you can use to sharpen your computational skills for sample size determination. Crest toothpaste is reviewing plans for its annual survey of toothpaste purchasers. With each case that follows, calculate the sample size pertaining to the key variable under consideration. Where informa- tion is missing, provide reasonable assumptions. iability share nown switched last year Acceptable Error 4% 5% 5% Confidence Level 95% 99% 95%