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Let X be uniformly distributed on the interval (1,5). Find the probability density function of Y=X/(5-X)
Let X and Y denote two points that are chose randomly and independently from the interval [0,1]. Find the probability density functions of Z=׀X-Y׀. Use this to calculate the mean distance between X and Y
Let Y be exponentially distributed with parameter 1, and let Z be uniformly distributed over the interval[0,1]. Assume Y and Z are independent. Find the probability density functions of W=Y-Z and that of X=׀Y-Z׀
Parts being manufactured at a plant are supposed to weigh 40 grams. Suppose the distribution of weights has a Normal distribution with mean 40 grams and a standard deviation 2 grams. Quality control inspectors randomly select 16 parts, weigh each, and then compute the sample average weight for the 16 parts. The sampling distribution of the sample mean
Question 2 in the attachment. Thx
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are “What is the highest level of education you’ve completed?” and “If you’re employed full-time, how many hours do you spend working at your job during a typical week?” In a recent year, 1142 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Group Sample Size Sample Mean Sample Variance less than H.S. 284 40.9 99.5 High School 275 42.3 112.1 Bach 283 41.4 106.8 Grad 300 42.1 98.7 To decide if there are any differences in the mean hours per week worked by these different groups, we can perform a one-way, independent-samples ANOVA test. Such a test uses the statistic Variation between the samples / F= Variation within the samples For the data from the survey, F ~1.13.
Typographical and spelling errors can be either “nonword errors” or “word errors.” A nonword error is not a real word, as when “the” is typed as “teh”. A word error is a real word, but not the right word, as when “lose” is typed as “loose.” When undergraduates are asked to write a 250-word essay (without spell-checking), the number of nonword errors has the following distribution: Errors 0 1 2 3 4 Probability 0.1 0.3 0.3 0.2 0.1 The number of word errors has this distribution: Errors 0 1 2 3 Probability 0.4 0.3 0.2 0.1 Find the mean and standard deviation of the total number of errors (nonword errors plus word errors) in an essay if the error counts have the distributions given above and (a)the counts of nonword and word errors are independent. (b)students who make many nonword errors also tend to make many word errors, so that the correlation between the two error counts is 0.4.
This is a 10 page power-point with 150 word (speaker notes) which is 1500 words. The Basic information did not allow me to enter this information as it really is. Consider the following scenario: As a respected healthcare professional, you have been invited to speak at a local town meeting to help educate the public on current events in healthcare policy. Some of your attendees may be knowledgeable regarding these current events, but some may not. Prepare a PowerPoint presentation demonstrating your understanding of current healthcare policy analysis and development using the concepts learned in this course. At a minimum, be sure to include the following: •Assess the current healthcare system with regards to organization and performance. •Describe and interpret any identified social disparities. •Outline competing agendas with regards to healthcare and provide recommendations for effectively working together. Provide specific examples where appropriate. Incorporate appropriate animations, transitions, and graphics as well as speaker notes for each slide. The speaker notes may be comprised of brief paragraphs or bulleted lists. Support your presentation with at least five scholarly resources. In addition to these specified resources, other appropriate scholarly resources may be included. Length: 10-15 slides (with a separate reference slide) Notes Length: 150-200 words for each slide Be sure to include citations for quotations and paraphrases with references in APA format and style where appropriate. Save the file as PPT with the correct course code information. The following rubric applies to the grading for this Signature Assignment. Grading Rubric Criteria Content (15 points) Points : 1 Assessed the current healthcare system with regards to organization and performance. 5 points 2 Described and interpreted any identified social disparities. 5points 3 Outlined competing agendas with regards to healthcare and provided recommendations for effectively working together. 5 points Organization (5 points) 1 Organized and presented in a clear manner. Included a minimum of five scholarly references, with appropriate APA formatting applied to citations and paraphrasing. Presentation is 10-15 slides long. 5 Total 20 essay supply
15. Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed. Population Study Sample Score p Tails of Test A 100.0 10.0 80 .05 1 (low predicted) B 100.0 20.0 80 .01 2 C 74.3 11.8 80 .01 2 D 16.9 1.2 80 .05 1 (low predicted) E 88.1 12.7 80 .05 2
Get college assignment help at uniessay writers What is the logic behind using the sum of the products of deviation scores as the numerator of the formula for the correlation coefficient? Is this logic sound? Why or why not?
The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of four hours. a) What is the probability that you do not receive a message during a two-hour period? (Round your answer to 3 decimal places.)
there are 12 lenghts of randomly selceted movies they are as follow: 110, 96, 125, 94, 132, 120, 136, 154, 149, 94, 119, 132. the question is construct a 99% confidence interval estimate of the mean length of all movies. ok the 99% on the chart is 2.262
3. A distance is measured 10 times. All measurements are independent and have the same precision. The standard deviation of each measurement is known to be 0.025m. The following values are obtained: 307.532m 307.500m 307.474m 307.549m 307.490m 307.527m 307.556m 307.502m 307.489m 307.514m a. Evaluate the sample mean for the distance and the standard deviation of this sample mean. b. Construct 50% and 95% confidence intervals for the population mean of the distance.
According to AccuData Media Research 36% of televisons within the chicago city limits are tuned to eyewitness news at 5pm on sunday nights. at 5pm on a given sunday 2500 such tv are randomly selected and checked to determine what is being watch. Would it be unusual to find that 954 of the 2500 tvs are tuned to eyewitness news?
The time between surface finish problems in a galvanizing process is exponentially distributed with a mean of 40 hours. A single plant operates three galvanizing lines that are assumed to operate independently. (a) What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation? (b) What is the probability that all three lines experience a surface finish problem between 20 and 40 hours of operation? (c) Why is the joint probability density function not needed to answer the previous questions?
The experiment is performed N times. In each experiment, the probability of realization of event A is equal to 0.2. What should be N, so that the probability that A is at least 15 times is 0.8?
Use the Standard Normal Distribution table to find the indicated area under the standard normal curve. a. Between z = 0 and z = 1.24 b. To the left of z = 1.68 c. Between z = -1.52 and z = -0.64 d. To the right of z = -1.54
. A researcher conducts an independent measures research study and obtains t= 2.070 with df= 28 a. How many individuals participated in the entire research study? b. Using a two-tailed test with a=.05, is there a significant difference between the two treatment conditions? c. Compute r squared to measure the percentage of variance accounted for by the treatment effect.
Suppose that starting salaries for university graduates with degrees in engineering are expected to be between €30,000 and €45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is required. What is the planning value for the population standard deviation?
Researchers conducted an experiment to test the effects of alcohol. The errors were recorded in a test of visual and motor skills for a treatment group of 22 people who drank ethanol and another group of 22 people given a placebo. The errors for the treatment group have a standard deviation of 2.20, and the errors for the treatment group have a standard deviation of 0.72. Use a 0.05 significance level to test the claim that the treatment group has errors that vary more than the errors of the placebo group.
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