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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.
Assuming population variances are equal; construct an appropriate 95% confidence interval for the difference in mean Gestation Age between infants born in Hospital B and Hospital C.
1- compute the condition number of each eigenvalues of the matrix 0 -1 1 2b and determine for which values of b the
For each question involving a statistical test below, list the null and alternate hypothesis statements. Use .05 for your significance level in making your decisions.
If you assume that last names should not have an impact on starting salary of graduates of BACC, then what is the appropriate null hypothesis?
An area is calculated by multiplying the length by the width. The pseudocode program below should ask the user for the length and width of a rectangular room in order to calculate the area, and display the room's area. Will it do the job.
Considering the variables and design that you described in the first discussion question 3, above what information would a one-way MANOVA provide you? What more would you want to know if you get significant results in the MANOVA? Why would this be..
What is the x-intercept of this tangent line? Use this fact to draw the tangent line and find the volume of the solid generated by rotating the top half
Many organizations today do not utilize business analytics to help them with their decision-making processes. For some organizations, it could be a lack of knowledge about how to apply it, and for other organizations, it could be a lack of technol..
Analysis of the climograph, identifying the climate zone by name and Koppen-Geiger classification and a discussion of the controls on the climate that produce this pattern.
What is the probability that exactly 1 of 10 cars experience breakdown: Use the Binomial Probability tables.
How can methods of improving system reliability be studied using simulation - when and how can simulation be applied to problems such as determining system life cycle cost and spares policies?
Based on experience with the current coffee makers, your best guess for the population standard deviation, sigma, is 1.2 cups. How big of a sample do you need? Calculate the estimated sample size needed for the above scenario and communicate your ..
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