TIUVIUE 95% confidence interval estimates of the population variance and the popula-tion standard deviation.9. An automotive part must be machined to close tolerances to be acceptable to customers.Production specifications call for a maximum variance in the lengths of the parts of .0004.Suppose the sample variance for 30 parts turns out to be swhether the population variance specification is being violated..0005. Use a = .05 to test(10. ) Consumer Reports uses a 100-point customer satisfaction score to rate the nation's majorchain stores. Assume that from past experience with the satisfaction rating score, a populationstandard deviation of o =12 is expected. In 2012, Costco with its 432 warehouses in40 states was the only chain store to earn an outstanding rating for overall quality. A sampleof 15 Costco customer satisfaction scores follows.959083759598808382938680946462a.What is the sample mean customer satisfaction score for Costco?What is the sample variance?What is the sample standard deviation?d. Construct a hypothesis test to determine whether the population standard deviationof o =b.с.12 should be rejected for Costco. With a .05 level of significance, what is yourconclusion?1. The variance in GMAT exam scores is 14,660 (the Graduate Management Admis-sion Council's official website of the GMAT, June 17, 2016), A group of economics

Answered: Image /qna-images/answer/b42b2859-a572-495f-9d20-0889dbce7a41.jpg

Answered: IS UCIIig VIOlatcu. 10.) Consumer…

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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A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their responses are shown on the right. 13 30 4 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median. Which measure of central tendency better describes hours worked? 13 6. 17 19 23 18 18 21 27 24 9 25 ..... Choose the correct frequency histogram below. OA. O B. C. Hours Worked Hours Worked Hours Worked per Week per Week per Week 10 20 30 10 20 30 10 20 30 hours hours hours Is the histogram for the data set skewed right, skewed left, or symmetric? skewed right skewed left O symmetric The mean number of hours worked by college students outside the home is approximately hours. (Type an integer or decimal rounded to three decimal places as needed.) The median number of hours worked by college students outside the home is hours. Which measure of central tendency better describes hours worked? median mode…
Find the median of the following given data: 10.1, 15.5, 35, 30, 30, 25, 15.5, 10.1, 17, 15.5 Need answer ASAP, need solution.
Consider the following data set. You may assume that the mean of this data set is x¯ = 7. 8 10 3 5 7 5 11 a) Find the range of the data set. b) Find the standard deviation of the data set. c) How many of the seven data points lie within one standard deviation of the mean?
Consider a sample with data values of 57,45,50,39,50,59,60, and 48. Compute the following values a. Mode b. 40th percentile c. Variance d. Standard deviation e. Coefficient of variation
A. Create a Histogram B. What is the sample mean of the data C. What is the sample standard deviation of the data
Compute each of the single-variable statistics discussed in class for the data below: 84.7 58.2 89.1 89.7 44.3 91.9 68.3 84.1 94.9 58.2 Find the mean, median, mode, 1st quartile, 3rd quartile, standard deviation, range, variance.
- As a newly hired Human Resources director for 'Quants R Us', you are provided with the following academic information for five (5) college graduates. The below table shows each students overall grade (range 0 to 100) for quantitative courses taken over their respective 4 year college career. 4 Student/Year FR SO JR SR 68 73 80 87 79 76 86 84 75 78 83 88 74 88 80 85 80 83 85 86 ABCD E (a) You are assigned the task of recommending which one of these college graduates should be offered a 3 year contract into the junior quantitative analyst in training program. Which student do you recommend? MU b) Your assignment is then changed to eliminate two of the candidates and offer three of these college graduates 3 year contracts into the junior quantitative analyst in training program. Which two students do you eliminate? (c) What are the limitations of your decisions? ***Provide the statistical analysis, calculations (tables graphs, etc.) utilized, along with the rationale behind your…
Use a calculator to find the standard deviation of this sample data: 122 141 140 118 155 174 198 133 168 195 Round to two decimals. Submit Question
Compare the following two sample data sets: A: 5,4,6,3,6,7A: 5,4,6,3,6,7 B: 6,5,7,6,1,8B: 6,5,7,6,1,8 Which data set has the greater sample standard deviation, and which data set has the greater range? Use the calculator if needed. Select the answer that is completely correct. The sample standard deviation of set B is greater. The range of set A is greater. The sample standard deviation of set A is greater. The range of set B is greater. The sample standard deviation of set A is greater. The range of set A is greater. The sample standard deviation of set B is greater. The range of set B is greater.

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