9. Suppose a regional market analyst believes the median repair cost estimates for Garage 1 is below that for Garage 2 (or the probability distribution of repair cost estimates for Garage 1 is shifted to the left of the probability of repair cost estimates for Garage 2). Use the Wilcoxon Signed Rank Test at the 0.05 level on the observations below to test this claim? Repair Repair Cost Estimate Garage 2 Cost Estimate Sample of Cars Garage 1 $ 710 $ 900 $ 1100 $ 890 $ 990 $ 910 $ 1030 $ 790 $ 1010 $ 1220 $ 880 $ 1040 $ 980 $ 1170 Car 1 Car 2 Car 3 Car 4 Car 5 Car 6 Car 7

9. Suppose a regional market analyst believes the median repair cost estimates for Garage 1 is below that for Garage 2 (or the probability distribution of repair cost estimates for Garage 1 is shifted to the left of the probability of repair cost estimates for Garage 2). Use the Wilcoxon Signed Rank Test at the 0.05 level on the observations below to test this claim? Repair Repair Cost Estimate Garage 2 Cost Estimate Sample of Cars Garage 1 $ 710 $ 900 $ 1100 $ 890 $ 990 $ 910 $ 1030 $ 790 $ 1010 $ 1220 $ 880 $ 1040 $ 980 $ 1170 Car 1 Car 2 Car 3 Car 4 Car 5 Car 6 Car 7

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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3. A survey was conducted two years ago asking college students their top motivations for using a credit card. To determine whether this distribution has changed, you randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the claimed or expected distribution? Use a = 0.10. Complete parts (a) through (d). Response Old Survey % 27% New Survey Frequency, f Rewards Low rates Cash back Discounts Other 110 24% 98 21% 107 7% 46 21% 64 a. State H, and H, and identify the claim. What is the null hypothesis, Ho? O A. The distribution of motivations differs from the expected distribution. O B. The distribution of motivations is 27% rewards, 24% low rate, 21% cash back, 7% discounts, and 21% other. O C. The distribution of motivations is 110 rewards, 98 low rate, 107 cash back, 46discounts, and 64 other. What is the alternate hypothesis, H,? O A. The distribution of motivations differs from the…
32.
There are three different ways I can go to work in the morning. I want to see if there is a difference in the distributions of travel-times between the three different ways. The sample data is depicted below. I claim there is a difference in mean travel times between the three different routes. I cannot guarantee that the distributions of these travel times are Normal. Travel Time in Minutes Interstate 22 22 21 23 22 21 Route 15 22 18 20 18 Back Roads 19 19 18 19 22 (a) Enter the rank values in the same order as in the original sample. Interstate Route 15 Back Roads (b) Give the value of the test statistic: (c) Test my claim at the 10% significance level.Enter the critical value: There is sufficient evidence to conclude that the population means are not equal.YesNo (d) Does your conclusion change at the 5% significance level?YesNo
3. The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. Complete parts (a) through (c) below. 68.82 79.26 68.51 84.96 80.53 87.25 101.72 98.77 3 Click the icon to view the table of critical t-values. (a) Determine a point estimate for the population mean travel tax. A point estimate for the population mean travel tax is $ (Round to two decimal places as needed.) (b) Construct and interpret a 95% confidence interval for the mean tax paid for a three-day business trip. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The travel tax is between $ and $ for % of all cities. B. There is a % probability that the mean travel tax for all cities is between $ and $ O C. One can be % confident that the…
7. Which of the following biases can be associated with the availability heuristic? A. When ease of recall is not associated with probability. B. Ease of imagination is not related to probability. C. Ignoring base-rate frequencies. D. Illusory correlation.
Consider the population of car drivers in the United States, and how many traffic tickets they've each received over the course of their lives. Would the distribution of these traffic tickets be left-skewed (where we often see mean median)? Pick ONE option Left-skewed Right-skewed It would be unreasonable to guess Potentially both at once
A report on Americans' opinions about long-term investments included data from a poll of 1,010 adults. The responses to the question "What do you think is the best long-term investment?" are summarized in the given relative frequency distribution. Response Real Estate Stocks & Mutual Funds Gold Savings Bonds Other Relative Frequency 0.30 0.25 0.20 0.15 0.10 Relative Frequency 0.05 0.00 0.32 0.21 0.19 (a) Use this information to construct a bar chart for the response data. CHOICE A 0.17 0.08 0.03 Funds Best Long-Term Investment CHOICE B (b) Write a few sentences on how people responded to the question posed. 0.20 0.15 0.15 ko. Lul M. ha. 0.10 0.10 0.05 0.05 Real Stocks & Gold Savings Boads Other Real Stocks & Gold Savings Boads Other Real Stocks & Gold Savings Bonds Other Real Stocks & Gold Savings Boads Other Estate Mutual Estate Mutual Estate Mutual Estate Mutual Funds Funds Best Long-Term Investment Best Long-Term Investment O 0.30 0.25 0.00 Ⓒ CHOICE C % of respondents answered that…
This problem will take you through calculating the mean for grouped data by hand.The reason that the class midpoint is used in the table below is because it is the expected value for the average score in each class. Part A: Lower Class Limit Upper Class Limit Frequency Class midpoint Frequency times midpoint 40 44 1 45 49 3 50 54 4 55 59 11 57 627 60 64 20 62 1240 65 69 13 67 871 70 74 7 72 504 75 79 7 77 539 80 84 1 82 82 Part B: Now add up the last column of the table above. Part C: Now add up the third column of your table. Part D: Now divide your answer to Part B by your answer to Part C. This is the mean for the Grouped Frequency Data Table (GFDT).
it is assumed that a production process may produce some defective items. it is found that 12 item are defective out of 100 randomly selected items. What is the point estimate of the population production of non-defective item of this production process? a. 0.12 b. 0.92 c. 0.08 d. 0.88
when a population distribution is symmetric, unimodal, without outliers?
1. A sample of the final exam scores in a large introductory math course is as follows: 85 60 65 70 84 75 42 50 75 37 80 73 88 89 85 80 96 99 68 95 a. Use Table in Appendix of most books to obtain the normal score, to construct a normal probability plot of the given data; (use excel sheet); b. Use part (A) to identify outliers%3; c. Use part (A) to access the normality of the variable under consideration.
Find the mean, median, and mode for a random sample of eight U.S. corporations with the following percentage changes in earnings per share in the current year compared with the previous year: 0% 0% 8.1% 13.6% 19.4% 20.7% 10.0% 14.2%