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Workers in 2 different mine groups were asked what they considered to be the most important labour-management problem. In Group A,
Mr. price Home analyzed the value of purchase made on credit by a sample of 25 credit card customers. The simple mean was found to be R170.08 with a sample standard deviation of R21.90. Assume purchas
Suppose the Total Sum of Squares for a design with k=6 treatments and n=36 total measurements (six per treatment) is equal to 500. In each of the following cases, conduct an F-test of the null hypothe
Help with this Cost Benefit Analysis Proposal for New Employee. Please provide work in detailed step by step instructions thank you very much.
Solution to managerian stastics question. suppose that a consultant for the supermarket counts the number of arrival per hour during a sample of 150 hour.
When using a t test for dependent means, show the steps involved in calculating the estimated population variance based on scores in this sample:
Random sample of 100 pieces of wire and wants to see if the thickness of a batch of wire meets minimum specifications. Assume that the population mean is 0.45 inch, with a standard deviation
You are interested in evaluating a new treatment for heart disease. (a) Discribe the population of interest. (b) Describe how you might obtain a random sample.
Find the approximate percentile ranks of these scores by constructing a percentile graph (Ogive).Use the Ogive, estimate percentile of a student who scored 200 points in the test? What is the student
The sample mean is 60 kilograms (kg). Suppose that the mean weights of male runners follow a normal distribution with unknown mean mu and standard deviation of 5 kg (sigma). What is the 95% confidence
Plot your t-intercepts from #1 above, your vertex from #2 above and the I-intercept from the function I(t) given above on an appropriately scaled axes (please label the scale and your points. Graph th
The following observations are weights of 10 potatoes in grams. Calculate the percentage of potatoes with weights greater than 25 grams and the range of weights for 95% of the potatoes. (Use sample st
What will be the standard deviation and the varience in each of the following casses
A company that manufactures computer chips wants to use a multiple regression model to study the effect that different variables have on y, the total daily production cost
Discuss why the nonparametric test was used. In order to do this, you will need to state. What was the Dependent Variable (DV) and at what level was it measured. What was the Independent Variable (IV)
Do creative people make better salespeople? Ten sales staff in a large company were given a creativity test (scores range from 0 to 20
Make a decision – For the purpose of this discussion, you will make a conclusion based on the hypothetical results from Step 4. Be sure to include a recommendation on the effectiveness of the ne
Suppose that 100 people are given lipid lowering drugs and that the drug appears to be effective in about 20 of them. Effective is defined as lowering their cholesterol values by 10 points in one mont
A bank manager recorded the number of hours taken to accomplish a particular task. He got the data below. Hours:10, 11, 12, 13, 14, 15, 16, 17, 18. Number of Employees: 2, 4, 6, 8, 10, 12, 14, 16, 18.
A test is given to graduates of tw buisness schools A and B. The scores are given out of 100. Test whether the school differ in quality by using Mann- Whitney U- test with a 10% level of significance.
In an industry,200 workers,employed for a specific job,were classified according thier performance and training received/not received to test independence of specific trainig and performance.The dates
Two impendent samples of signs 9 and 8 gave the sum of squares of deviation from their respective means as 160 and 91 can the samples be regarded as drawn from the normal population with equal varianc
The Ministry of Environment, Science and Technology has one of its administrative centers located out of town and the majority of employees drive to work. As part of the Ministry’s ‘green&
A drug company want to know if new drug lowest the cholesterol below the target level of 120.A random sample of 25 questions has a mean of 115 and a standard deviation of 20
General scores on academic performance in english language using 60 participant. let the highest score be 90 and 10. use a class inertval of 10 create your class interval and frequency and use the inf