Question: A 95 confidence interval for a population mean was reported
A 95% confidence interval for a population mean was reported to be 152 to 160. If σ = 15, what sample size was used in this study?
Answer to relevant QuestionsData were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based on past studies the population standard deviation is known with σ = ...The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers ...A simple random sample of 800 elements generates a sample proportion ṕ = .70.a. Provide a 90% confidence interval for the population proportion.b. Provide a 95% confidence interval for the population proportion.The National Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses. Assume that a sample of 450 college students was used in the study.a. Provide a 95% confidence ...The average cost per night of a hotel room in New York City is $273 (Smart Money, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard deviation is $65.a. With 95% confidence, what ...
Post your question