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1. Your average weekly grocery bill at the store you usually shop is $300. You decided to test a new strategy of buying most items over the weekend from Costco in bulk and when you fall short of some items during the week or the once not appropriate for Costco, you buy from a convenience store near you. You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using α=.05.
2. You started a new restaurant. Based on invoices for the first 30 days, you estimated your average grocery bill to be $20,000 with a standard deviation of $2000. You want to start another restaurant in a similar neighborhood and you are planning to prepare a brochure for investors and to work out a deal with a whole sale food distributor. Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
3. You move to a new town and want to decide on when to start for work. You do not want to reach too early and not be too late too many times. You, thus, collected data for 10 days and obtained an average of 34.5 minutes. You took the standard deviation of 4.5 minutes from a commuting friend and believe that that is the standard deviation for the area. Prepare a 95% confidence interval for the true average commuting time.
1.a state the limit de?nition of the derivative fx.b using the limit de?nition of the derivative compute fx when f x
Find the equation of the tangent line to the graph and Find the velocity and the acceleration of the particle and position of a particle moving along a straight line
Question: Using the information in A and B, find the probability that the difference in mean BMI for 30 women and 35 men selected independently and at random from the respective populations will exceed 3.20.
How many elephants does the researcher need to weigh so that he can be 80% confident that the average weight of elephants in his sample is within 350 pounds of the true average weight for this subspecies?
Compare and contrast the differences between a single-phase queuing system and multiphase queuing system. Describe your answer in full.
A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To test this claim against the alternative that the actual proportion of doctors who recommend aspirin is less than 0.90, a random sample of 100 doctors ..
Develop a Research Question: In your area of interest, think about a research question that could be answered using a hypothesis test. Write down this research question, and explain what your research is trying to investigate.
Find the solution of the exact differential equation and separable differential equations
What is the independent variable in this study? What are the dependent variables?
How many degrees of freedom are there? Would each respondent need to evaluate each product combination to obtain good results?
Find the probability density function.
Find an article in a professional journal that uses the tools of numerical measurement we focused on in these chapters. Write a brief report describing the impact of these tools and how they were effective or ineffective in illustrating the resear..
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