The survey of drugstore customers also collected data on ages. Lynda Parks has always thought that the average age of her customers is around 40. At the 5% level of significance, what can you conclude, based on the sample data?
Answer to relevant QuestionsThe survey of drugstore customers also collected data on speed of service. At the 3% level of significance, is there evidence that more than 40% of customers rate the service as good or excellent? Suppose you have null and alternative hypotheses as follows: H0: p = 0.26 H1: p ≠ < 0.26 Assume that the sample size, at 200,is less than 5% of the population. The sample proportion is 0.30.Estimate the p-value for this ...A company wants to estimate the proportion of smokers on staff to within 5%, with 99% confidence. A preliminary estimate of the proportion of smokers is 0.1867. How big a sample size is necessary? Return to the confidence interval you constructed for Develop Your Skills 8.2, Exercise 9.You believe that the average mark on the statistics test was 50%. Does the sample evidence support your belief? What level of ...In a survey, 43% of the 2,450 respondents said they had phoned in sick when they were not ill. Construct a 99% confidence interval estimate for the proportion of workers who phone in sick when they are not ill. Do you think ...
Post your question