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Problem 1: PART I. HYPOTHESIS TESTING
Conduct a one-tailed hypothesis test given the information below.
A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 216 days. After a revised mix has been developed, a sample of nine boxes of cake mix had a mean of 217.222 and a standard deviation of 1.2019. At the 0.025 significance level, what is the critical value? State the null and alternative hypothesis. Draw a diagram. Provide the computation of the test statistic. State your decision in terms of the null hypothesis.
Use the ustudy.sav file. This time, consider that you collected data only on ACADRNK, YRSPHD, SALARY, and PUBLCTN from the 20 faculty. The purpose of your analysis is to group this faculty into separate clusters based on the data you have.
1.Refer to the time series data in Exercise 1. Using the average of all the historical data as a forecast for the next period, compute the following measures of forecast accuracy:
Point is uniformly distributed in the unit sphere in three dimensions. a) Determine the marginal densities of the x, y, and z coordinates.
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected.
find two dollar values such that 95% of all gas stations charge somewhere between these two values.- Can you find any other acceptable answers?
A car rental company has determined that the probability a car will need service work in any given month is 0.2. The company has 900 cars.
Given a situation where a control chart with 3-sigma limits is being constructed to monitor the percentage of defective items produced by a process, if samples of 100 units each are taken from the process and the average percent defective found in..
What is an aggressive financing strategy? What are the components of aggressive finance strategies? What is difference between the aggressive and conservative financing model?
Find the largest number of room reservations that this hotel can book and still be at least 95% sure that everyone who shows up at the hotel will have a room on a given night.
Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.
physicians at a clinic gave what they thought were drugs to 920 asthma ulcer and herpes patients. although the doctors
Find a 90% confidence interval for the proportion of Americans who would agree with this. Interpret your interval in this context. Explain what "90% confidence" means.
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