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Enter your answers in the spaces provided. Save the file using your last name as the beginning of the file name (e.g., ruf_week8_exercises) and submit via "Assignments." When appropriate, show your work. You can do the work by hand, scan/take a digital picture, and attach that file with your work. 1. A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal. Thus, a prestudy was designed in which participants were asked which of the rewards they preferred. Of the 60 participants, 16 preferred cupcakes, 26 preferred candy bars, and 18 favored dried apricots. Do these scores suggest that the different foods are differentially preferred by people in general? (Use the .05 significance level.) a. Use the five steps of hypothesis testing. b. Sketch the distribution involved. c. Explain your findings. 2. A high school principal wanted to know if the racial makeup of her teachers mirrored that of the student body. The student body broke down into 47% White, 28% Latino, 15% African American, and 10% other. Of the 65 teachers, 42 were White, 4 were Latino, 15 were African American, and 4 were Other. Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings. 3. Please make up and discuss research examples corresponding to the various techniques introduced throughout this course. Describe a plausible study for each of the following statistical procedures, indicating how it would apply and what results you would predict. Also include information about the number of participants you would assess and how you would go about estimating effect size and statistical power (when relevant). a. correlation b. multiple regression c. t test for independent means d. t test for dependent means e. ANOVA f. chi square for goodness of fit g. chi-square test for independence
Derive the expression for the PDF of X
What is the preventive maintenance cost that makes the manager indifferent between a one week and a two week preventive maintenance strategy?
A researcher hypothesizes that people who listen to music via ear buds have greater hearing loss than those in the general population. On a standard hearing test, the mean (μ) is 24.75. Higher values indicate better hearing
1. Provide a recommendation to the president that maximizes profits
A Russian SVR agent has 45 million dollars which he can spend to bribe academics, politicians, and bloggers to spread disinformation and to promote anti-American propaganda
the pdf for frechet distribution is ltbrgtfxa?a x-?-a-1 exp-x-?-a ltbrgtthen how we can calculate the cdf for frechet
The researchers used the available survey data and summarised the nature of the car accidents and if a mobile phone was being used by the driver either during (or immediately before) the accident
The purpose of this assignmentto test a student's expertise in developing an introduction and writing a review of related literature and developing research gaps that can be addressed by future studies
what portion of variation in stock price percentage change is explained by the percent change in profit and what is the approximate predicted value for tips if the total bill is $100?
Find the probability that exactly 15 babies are female and find the probability that no more than 12 babies are female.
condence interval fornbspmu when sigma is knownsuppose n 9 people are selected at random from a large population.
1. find the equation of the regression line for the given data.nbsp what is the predicted value of y when x -2?nbsp
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