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Show why you support Chrysler's claim by listing the P -value from your output. After more complaints, you decide to test the variability of the miles per gallon on the highway.
Indicate your hypotheses, decision rule, statistical decision and management conclusion using the critical value and then find the p-value and state your decision rule.
Draw 20 more samples and add the 20 new x-bars to the histogram in part b. Describe the distribution that seems to be developing.
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make?
Suppose 25 subjects were selected for each of the six treatment combinations and the sample means for each treatment combination are as follows (standard deviations are in parentheses.
Use a two-way ANOVA to analyze these data. Report the test statistics, degrees of freedom, and P-values for the significance tests.
A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week. What is the maximum error of estimate she allows?
A sample of 120 homes sold recently in a big city gave the mean price of homes equal to $270,000. What is the point estimate of the mean price of all homes in the big city?
Does the data indicate that the mean remission time using the new drug is different from 12.5 week at a level of significance of 0.01?
What is the point estimate of the mean planned expenditure by all Americans taking long summer vacations in 2002? What is the 95% margin of error for the above mean planned expenditure?
Specimens of three di erent types of rope wire were selected, and the fatigue limit (MPa) was determined. Compare the variations in three types using their respective sample standard deviations.
Need to Analyze the data and determine whether there is a difference in the mean delivery time in the two counters of the bank branch. (Use α= 0.01)
Write a report to your manager about the results, distilling down the results in a way that would be understandable to someone who does not know statistics. Clear explanations and interpretations ar
What is the probability that house sales will increase but interest rates will not during the next 6 months? Show or explain how you obtain your answer.
The average delivery time is 26.7 with a standard deviation of 8.527. If the customer estimates the time using a 99% confidence interval, what is the margin of error?
You want to create a 90% confidence interval for the true average number of yards per game he throws. What is the margin of error for this estimate?
With a standard deviation of 7.695 hands and you calculated a 90% confidence interval to be (170.603, 175.377). Your manager believes the true mean is 242.4. Which of the following is the best concl
You create a 95% confidence interval for your average score and it is (76.347, 79.133). Given this information, what is the best conclusion?
If the customer knows the standard deviation of the delivery times of all pizzas is 9.646, how many pizzas will need to be ordered?
Find the probability of accepting a lot as a function of the actual fraction of defective chips. In particular, let the actual fraction of defective chips in a given lot equal.
Compute the standard deviation of the sample using the shortcut formula. Show the formula and values for each term and compute the answer. Use the TFE Equation Editor.
Set up side-by-side bar charts by year using the instruction for Side-By-Side Charts in the Class Notes Conference. Copy/Paste your Chart into the TFE Editor from EXCEL.
Compute this as P(B2)*P(A3¦ B2) . Rows are B1 & B2: columns are A1, A2 & A3. What are the values of P(B2) , P(A3|B2) and P(B2&A3)? In what row and column will you find this answer?
Compute the 5 number System for this data set and list Xmin,Q1,Q2,Q3 & Xmax. Show how the pointer was computed for each quartile.
Assume that prices of two-year-old Honda Civics are normally distributed. At the 5% significance level, is there a difference in the price of the cars in these cities?