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Question:
The following data represents the car tyres life time (in days) for three different companies in India:
Company 1: 300 245 438 460 380 510 490 320 405 482Company 2: 500 470 530 390 480 510 546 464 457 393Company 3: 280 295 320 266 344 325 295 361 349 400
(a) Compute the mean, median, first quartile, and third quartile for each company.
(b) Compute the standard deviation, range and coefficient of variation from the sample data for each company.
(c) Draw a box and whisker plot for each company and put them side by side.
(d) Compare the box plots and describe the skewness of the data.
There were 20 students in the class. Develop an ANOVA table for the regression analysis of hours studied as a predictor of the grade earned on the first statistics exam.
questionto test the efficacy of admissions or release an emergency room embarks on a controlled experiment. each
Indicators of a maternal diagnosis of toxemia during the pregnancy, a condition characterized by high blood pressure and other potential complications, are saved under the variable name tox (1: toxemia; 0: no Toxemia).
Compute a seasonalized or adjusted sales forecast.
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per microliter) is measured. The sample mean is 5.23 and the sample standard deviation is 0.54. Use a 0.01 significance level to test the claim that ..
Describe 5 data collection techniques in your own words. Explain why the four demographic questions you included in your survey are important and or are of interest to the study.
Analyze a publicly traded company's financial statements for the prior five years. Include the following items as supplemental schedules to the analysis, prepared as individual worksheets
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles.
In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested.
Determine the average number of parts waiting to be worked on, the percentage of time the operator is working, and the percentage of time the machine is idle.
What are the implications to a business if the forecast is too high - show a graph of the historical and forecasted sales in one graph
Determine the expected shape of distribution of sample mean? Compute the likelihood of choosing a sample with mean of at least $112,000?
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