324on 25Kinstructor3255 (1).docx!7A1optionRefer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below.Za. What is the number of degrees of freedom that should be used for finding the critical value ₁/2?df=(Type a whole number.)b. Find the critical value a/2 corresponding to a 95% confidence level.¹/2-0(Round to two decimal places as needed.)c. Give a brief general description of the number of degrees of freedom.2DOA. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values.OB. The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values.OC. The number of degrees of freedom for a collection of sample data is the total number of sample values.OD. The number of degrees of freedom for a collection of sample data is the number of unique, non-repeated sample values.7W5373255.docxS3XдвcommandF3ED$4CRFNO REF SAMPLE.pdf%5V♥TG6AMacBook AirBVYTEMPLATE Sel.....docxH&7UN8JADIE1MD(9Kresume..docxDDO<1двOL4PcommandClear all->{+roption(13.046,22.15)x= 17.598Sx= 16.01712719n=50?Tinterval11TCheck answerShow AllCO1xdelete▼

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Answered: a. What is the number of degrees of…

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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Determine the critical value zα/2zα/2 that corresponds to a 96% level of confidence.
Suppose that in a simple random sample of 30 chicken carcasses from the ACME chicken plant (which has 10,000 chickens), 5 test positive for salmonella and 25 test negative for salmonella. Provide a point estimate and 95% CIs for the prevalence of salmonella among chicken carcasses from the ACME plant, assuming the test is 100% accurate. For the confidence interval, use a two-sided interval and report results from both the “exact method” and the “normal-theory method” (large sample approximation), then comment on whether the normal-theory method is reasonable based on comparison with results from the exact method.
An inventor, working at a science tech lab, believes innovations in satellites are increasing. The inventor would like to test the claim that the average number of new ideas for satellite development per month at the science tech lab is over 60 new ideas. Using the computed test statistic of 1.05 and the critical value of 1.28, is there enough evidence for the inventor to reject the null hypothesis? Use the graph below to interpret the critical value. First select the appropriate test type (left-, right-, or two- tailed), then plot the points along the x-axis (for the critical value and test statistic), and use them to choose the appropriate interpretation.
Let p1 and p2 be the respective proportions of women with nutritional anemia in each of two developing countries. If a random sample of 300 women from the first country yielded 105 women with nutritional anemia, and an independently chosen, random sample of 325 women from the second country yielded 78 women with nutritional anemia, find a 90% confidence interval for −p1p2. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your responses to at least three decimal places. (If necessary, consult a list of formulas. a.) Lower Limit is: b.) Upper Limit is:
A builder claims that bidets are installed in 70% of all homes being constructed today in suburban Lapu-lapu. Would you agree with this claim if a random survey of new homes in this city showed that 80 out of 150 had bidets installed? Use a 0.10 level of significance. What is the critical value?
The Office of the University Registrar of Seoul University would like to know if the degree programs in College of Science and Math are equally preferred by students.The test claim that the proportions of the students enrolled are equal in each degree program at alpha=0.05 Using the data on the number of currently enrolled students in each gender (M of F) in each of the four degree programs, fill out the table below and find the: a. Chi-square critical Value b. Chi-square test statistic
Compute the critical value zα/2 that corresponds to a 84% level of confidence.
A researcher conducted a one-way ANOVA and found F(3,27) = 3.5. In other words, dfbetween = 3 and dfwithin = 27. Using α = .01, the researcher should REJECT the null. (Hint: You will need to use the critical value table.)
A university wants to investigate 'low-performance' modules - where low-performance is defined as a module with an average final mark lower than 50 in a given year. To test whether ECO242 is a 'low-performance' module, a researcher gathers data on final marks for 31 first ECO242 students from past years. If the mean and variance of this sample is estimated, respectively, as 48 and 38, test the hypothesis, at α=0.05, that the true mean is 50 against the hypothesis that it is less than 50. Q2: What is the null and alternative hypothesis?
A group of researchers wanted to see if taking an energy drink influences the scores of Math students. It has been observed that the average test score for non-drinkers is 6.77 points, and in 30 Math students, the average test score is 7.8 points with same standard deviation of 2.9 points. At alpha=10, compute the critical value.
From a large number of actuarial exam scores, a random sample of 375 scores is selected, and it is found that 273 of these 375 are passing scores. Based on this sample, find a 95% confidence interval for the proportion of all scores that are passing. Then find the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.
A random sample of 10 secretaries was asked to type a certain memorandum using both computers and typewriters, and the time required to finish the task was recorded for each secretary. A test of hypothesis will be conducted to determine if there is enough evidence to conclude that the average time required to type a certain memorandum is faster if female secretaries are using computers rather than typewriters using a 5% level of significance. What are the critical value(s) that will be used in the conduct of the above test of hypothese a)1.812 b)2.262 c)1.8331 d)1.960 I know the options B and D are wrong but I cant get the correct answer. I need help in solving to the right option

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