A sales analyst wants to determine whether there is a difference in the mean monthly sales of a company'sfour sales regions. Several salespersons from each region are randomly selected and they provide theirsales amount (in thousands of dollars) for the previous month. Using a 5% significance, can we conclude atleast one region is different on average?Region SalesNorthNorthNorthNorthEastEastEastEastEastSouthSouthSouthSouthWestWestWestWestWest21363328283531353912227272330273139What is the factor variable? [Select an answerWhat is the response variable? [Select an answerTest Statistic:P-Value:Decision Rule: Select an answerDid Something Significant Happen? Select an answerThere Select an answer to conclude Select an answer

Given: The data for the sales amount of several regions for the previous month is provided.…

Answered: A sales analyst wants to determine…

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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The Economist collects data each year on the price of a Big Mac in various countries around the world. The price of a Big Mac for a sample of McDonalds restaurants in Europe in May 2009 resulted in the following Big Mac prices (after conversion to U.S. dollars): 3.80 5.89 4.92 3.88 2.65 5.57 6.39 3.24 The mean price of a Big Mac in the U.S. in May 2009 was $3.57. For purposes of this exercise, assume it is reasonable to regard the sample as representative of European McDonalds restaurants. Does the sample provide convincing evidence that the mean May 2009 price of a Big Mac in Europe is greater than the reported U.S. price? Test the relevant hypotheses using α = .05. Assume a normal distribution of the data.x¯x¯=; ss=H0H0: μ=μ=HaHa: μμ (Put in the correct symbol and value)α=α=P-value =
The Economist collects data each year on the price of a Big Mac in various countries around the world. The price of a Big Mac for a sample of McDonalds restaurants in Europe in May 2009 resulted in the following Big Mac prices (after conversion to U.S. dollars):3.80 5.89 4.92 3.88 2.65 5.57 6.39 3.24The mean price of a Big Mac in the U.S. in May 2009 was $3.57. For purposes of this exercise, assume it is reasonable to regard the sample as representative of European McDonalds restaurants. Does the sample provide convincing evidence that the mean May 2009 price of a Big Mac in Europe is greater than the reported U.S. price? Test the relevant hypotheses using a = .05. Assume a normal distribution of the data. x = Ho: μ = Ha: Select an answer α= P-value = |: S= Based on the above we choose Question Help: Post to foru Submit Question (Put in the correct symbol and value) ✓ Select an answer Reject the null hypothesis Fail to reject the null hypothesis
Employee Salary (K$) CEO 299 CTO 250 CIO 250 CFO 290 Manager 77 Manager 123 Manager 84 Manager 63 Manager 68 Manager 49 Manager 82 Manager 87 Supervisor 42 Supervisor 37 Supervisor 29 Supervisor 43 Supervisor 51 Supervisor 38 Supervisor 33 Supervisor 42 Supervisor 49 Worker 25 Worker 19 Worker 41 Worker 17 Worker 26 Worker 25 Worker 21 Worker 28 Worker 27 Look at the data and answer the questions. -what percentage of the employees make more than the mean salary? -what percentage of the employees make more than the median salary? -what percentage of the employees make more than the mode salary? -in his radio show A Prairie Home Companion host Garrison Keillor regularly tells his audience about Lake Wobegon, where "all the children are above average". Is that possible, with any of the meanings of "average"?
Students in a statistics class wrote as many letters of the alphabet as they could in 15 seconds using their nondominant hand. The figure for this exercise is a boxplot that compares the number of Metters written by males and females in the sample. Males Females 5 7 13 15 19 21 23 (a) What is the median number of letters written by females? letters (b) What is the median for males? letters (c) Explain whether the interquartile range is larger for males or for females. The IQR is larger for -Select- (d) Find the value of the range for males. | letters (e) Find the value of the range for females. letters Submit Answer W 19 ... MacBook Air O00 A00 F4 F7 FB F9 F10 FIV F12 FI F2 F3 F5 F6 @ 2# $ % &
U.S. companies lose billion 63.2 per year from workers with insomnia. According to 2013 a article in The Wall Street Journal, workers lose an average of 7.8 days of productivity per year due to lack of sleep. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers. 7 5 10 7 7 8 8 5 9 6 7 7 9 6 8 8 9 5 10 7 a. What is the mean number of hours of sleep for this sample (to decimals)? b. What is the variance? Standard deviation (to decimals)? Variance Standard deviation
The figure below shows relative frequency histogram for 50 employees working in a small construction company classified according to their years of experience. While x-axis represents the class midpoints of experience years, y-axis represents relative frequency for the employees. The value of variance for the years of :experience is between Relative Frequency for Employees 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 7.5 Relative Frequency Chart 13.5 19.5 Class Midpoints of Experience Years 25.5 32-34 O 40-42 O 12-14 O 20-22 O 52-54 O
Using the data set below, what is the mean number of syphillis cases in Region 4 for the period 2008-2012? *
The average American spends $65.88 per month dining out (The Des Moines Register, December 5, 1997, USA). Asample of young adults provided the following dining out expenditure (in dollars) over the past month.253 101 245 467 131 0 22580 113 69 198 95 129 12411 178 104 161 0 118 15155 152 134 169 a. Compute the mean, median, and mode.b. Considering your results in part (a), do these young adults seem to spend about the same as an averageAmerican eating out?c. Compute the first and third quartiles.d. Compute the variance and standard deviation.
The Economist collects data each year on the price of a Big Mac in various countries around the world. The price of a Big Mac for a sample of McDonalds restaurants in Europe in May 2009 resulted in the following Big Mac prices (after conversion to U.S. dollars): 3.80 5.89 4.92 3.88 2.65 5.57 6.39 3.24The mean price of a Big Mac in the U.S. in May 2009 was $3.57. For purposes of this exercise, assume it is reasonable to regard the sample as representative of European McDonalds restaurants. Does the sample provide convincing evidence that the mean May 2009 price of a Big Mac in Europe is greater than the reported U.S. price? Test the relevant hypotheses using a = .05. Assume a normal distribution of the data. x = S= Ho: μ = Ha: Select an answer (Put in the correct symbol and value) α= P-value: = Based on the above we choose t✓ Select an answer Question Help: Post to forur Reject the null hypothesis B
Q2. The 30% trimmed mean of the following data (120, 150, 170, 177, 178, 193, 198, 250, :450, 955} is 186.5 O 182.5 O 188.3 O 183.5 O 184.5 O 185.5 O
Secretary of State Roxana Tillerson is worried about malpractice at the 4 processing centers for Green Cards in the country. Green Card applications are given a grade g on a scale 0-100. They are assigned randomly to different centers and thus Tillerson expects all centers to have similar mean scores. She collects the data in the table. #applications 9360 67.27 15.29 1 9870 66.74 14.64 7020 66.94 15.14 3 5040 67.02 14.84 4 rows x 3 columns At this point she just wants to decide whether or not to initiate a deeper investigation into malpractice at all sites. Does she have sufficient evidence for this, at 6% significance? SSTT number (rtol=0.01, atol=0.0001) SSE number (rtol=0.01, atol=0.0001) F. number (rtol=0.01, atol=0.0001) P-val number (rtol=0.01, atol=0.0001) O (a) No, she cannot make a conclusion O (b) Yes, she has enough evidence Select the key assumptions in the test you used. O (a) The populations are independent and therefore their covariances are zero. O (b) All sample sizes…
C. An agricultural researcher wants to compare the mean numbers of pods between three plot types (Liberty, No Till and Chisel Plowed). For each plot type, he records 7 measurements of the number of pods. Liberty 37 31 36 35 43 37 38 No Till 34 30 38 27 40 42 39 Chisel Plowed 32 37 24 23 32 34 36 Using a 0.05 level of significance, test the hypothesis that the actual mean numbers of pods are equal across the three plot types.

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