STATISTICS TEST Length: 1090 words (3.1 double-spaced pages) Rating: Red (FREE) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Statistics are necessary for scientific research because they allow the researchers to analyze empirical data needed to interpret the findings and draw conclusions based on the results of the research. According to Portney and Watkins (2009)‚ all studies require a description of subjects and responses that are obtained through measuring central
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9 p-test or z-test ‚ using the critical value method Question 10 p-interval question Question 11 Given set of data points‚ calculate correlation coefficient(r) and r2 Question 12 Binomial probability question Question 13 Identifying null and alternate hypothesis Question 14 Finding probability from z tables Question 15 Z distribution question- Chapter 5 Question 16 Given a set of data points‚ you have to find the equation of the line- Chapter 9 Question 17 Identifying if the variable
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BMA 140 WINTER 2011 PRACTICE (Midterm) 1. Monthly rent data in dollars for a sample of 10 one-bedroom apartments in a small town in Iowa are given below: 220 216 220 205 210 240 195 235 204 250 a. Compute the sample monthly average rent b. Compute the sample median c. What is the mode? d. Describe briefly what each statistic in parts a. to c. tells you about the data. 2. Suppose that a firm’s sales were $2‚500‚000 four years ago
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in this case‚ the sample size is 64-bottles of beers are large enough to assume the distribution for a probability is approximately normal nπ=64(0.5)=32>5n1-π=641-0.5=32>5 Among the three new machines‚ the population mean was obtained at 16 ounces with a standard deviation of .16 ounces. By obtaining a Z-score at -.35 for the sampling distribution‚ it’s believed that the probability of the new machines producing a group of 64 bottles with a mean of 15.993 ounces will be 36.32% In another
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What is the probability that the engineer incorrectly passes a day’s production as acceptable if only 85% of the day’s Blu-ray players actually conform to specification? From the given information‚ we can know both problems are n Bernoulli Trials‚ where n 13 . Suppose p is probability that the engineer passes a day’s production
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completion time is 45.83 days. The expected completion is very close to the realtor’s due date for project completion. Required probability analysis will also be performed that the project will be completed‚ as follows as per the probability analysis Moore Contractors Probability Analysis Assuming that all activities and paths are independent following is the probability calculation. In addition
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Of course‚ if you recognized the fact that our standard Z-transformation accomplishes precisely this‚ you could write the transformation as . 1b. Find the probability that . Convert X into a standard normal via Z= . For X=18‚ Z=-1. For X=36‚ Z=.5. The probability that X is between 18 and 36 is thus equivalent to the probability of Z between -1 and .5. The latter term is F(.5)-F(-1)=.6915-.1587=.5328 1c. Supposing 5X‚ find the mean of . This is actually easier than 1a or 1b. μY =a+b
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event. b What is the probability that a randomly chosen applicant‚ i had either work experience or a certificate? ) = = = 0.9 ii has neither work experience nor a certificate? iii has a certificate if he has some previous work experience? = 0.33 2. Because of economic conditions‚ a firm reports that 30 percent if its accounts receivable from other business firms are overdue. If an accountant takes a random sample of 10 such accounts‚ determine the probability that p=30% @ 0.3 n=10
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that red is the most popular. Scruffies are packed randomly‚ and on average 25% are red. (i) Find the probability that a packet contains no more than 6 red Scruffies. [2] (ii) Find the probability that a packet contains exactly 4 red Scruffies. [2] Because of a fault in the packing machine‚ one packet in ten now contains 19 Scruffies instead of 18. (iii) Find the new probability that a randomly selected packet contains exactly 4 red Scruffies. [5] In order to increase sales
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Question 4 2 out of 2 points What is the probability of rolling a number less than or equal to 6 on a six sided die? Selected Answer: 1 Correct Answer: 1 Response Feedback: P(event) = Question 5 2 out of 2 points What is the probability of picking a “g” in the word Georgia? Selected Answer: Correct Answer: Response Feedback: P(event) = Question 6 2 out of 2 points What is the probability of picking an “m” in the word Alabama? Selected
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