The Texas Department of Health published the statewide results for the Emergency Medical Services Certification Examination. Data for those taking the paramedic exam for the first time gave an average score of 79.68 (out of a possible 100) with a standard deviation of 9.06. Suppose a random sample of 50 individuals taking the exam yielded a mean score of 81.05. Is there sufficient evidence to conclude that “the population from which this random sample was taken, on the average, scored higher than the state average”? Use a = 0.05
Answer to relevant QuestionsAccording to the Center on Budget and Policy Priorities’ article “Curbing Flexible Spending Accounts Could Help Pay for Health Care Reform” (revised June 10, 2009), flexible-spending accounts encourage the ...The manager at Air Express believes that the weights of packages shipped recently are less than those in the past. Records show that in the past, packages have had a mean weight of 36.5 lb and a standard deviation of 14.2 ...The weights of full boxes of a certain kind of cereal are normally distributed with a standard deviation of 0.27 oz. A sample of 18 randomly selected boxes produced a mean weight of 9.87 oz. a. Find the 95% confidence ...A fish hatchery manager wants to estimate the mean length of her 3-year-old hatchery-raised trout. She wants to make a 99% confidence interval accurate to within 1\3 of a standard deviation. How large a sample does she need ...The college bookstore tells prospective students that the average cost of its textbooks is $90 per book with a standard deviation of $15. The engineering science students think that the average cost of their books is higher ...
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