Problem#6 19. Age of Death-Row Inmates In 2002, the mean age of an in- mate on death row was 40.7 years, according to data obtained from the U.S. Department of Justice. A sociologist wondered whether the mean age of a death-row inmate has changed since then. She randomly selects 32 death-row inmates and finds that their mean age is 38.9, with a standard deviation of 9.6. Construct a 95% confidence interval about the mean age. What does the interval imply? Answers: Fail to Reject Ho: t(critical) = -2.0395, t-value = -1.06. Cl = 42.36 - 35.44

Stanford University researchers published an MIT working paper titled “The Economics of Ride Hailing: Driver Revenue, Expenses, and Taxes” (February 2020). One of the objectives of the study was to determine whether ride-share drivers at Uber and Lyft actually make a profit. Data collected from a sample of 1,121 ride-share drivers yielded a mean monthly profit  �¯=$661 with standard deviation �=$583. An Uber executive reports that �, the true mean monthly profit of all its ride-share drivers, is $1,000. You want to test the executive’s figure using �=.10. Set up the null and alternative hypotheses for the test. Assume that you believe the true mean monthly profit is less than $1,000. Find the rejection region for the test. Compute the test statistic. Use statistical software to find the p-value for the test. What is your conclusion? Show that the conclusion is the same whether you use the rejection region or p-value.

What is the kappa statistic of the following model? Actual Predicted   no yes no 42 11 yes 3 56   Group of answer choices 0.7987 0.9259 0.9091 0.7473

liddle Technical University lectrical Engineering Technical College epartment of Computer ngineering Techniques Subject: Advanced Coding Techniques Stage: Ph. D Course Date: 18/5/2022 Lecturer: Dr. Mahmood F. Mostch Time: Three Hours 2nd Semester 2022/2023 Note: Attempt all questions 21: For the following probabilities set: [0.02, 0.48. 0.1, 0.2, 0.12, 0.08]: a- Determine the self-information for each one, and draw its relation with probabilities. b- Calculate the source entropy, and suggest a suitable values to approach the maximum self-information. c- Calculate the source entropy rate for the periods of [1, 2, 3, 2, 3, 1] msec. corresponding to each event. d- Rearrange the probabilities set as a (2 x 3) matrix, then find the joint entropy, source entropy, and marginal entropy. - Develop the Haffman and Shannon-Fano codes for use above set, and calculate the code efficiency for the each code. 22 Using the (7, 5 NSC (2, 1, 3) convolutional code to encode the message (1100101). Draw the…

Suppose you wish to study the relationship between the number of 'likes' on Facebook and the number of 'friends' one has on Facebook. Describe the statistical technique you would use.

Use R to solve the following tasks. TASK 1. Estimate the following probabilities by simulation (we don't want to see any analytical approaches!) In your report explain your code and show your answers. a. You have all the black cards from a normal deck, I have all the red cards. We each choose one card from our half decks - the highest card wins. But I have managed to sneak out and throw away your 9 Of Clubs! Simulate 1000 games - how many did I win? (Ace is low.) b. There are 87 people on a bus - what is the likelihood that two of them share a birthday? c. How many people would you need to gather together before there is a 90% chance that one of them was born on the 1st Jan?

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An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 40, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.)   (b) What is the probability that at least 10 of these are from the second section? (Round your answer to four decimal places.)   (c) What is the probability that at least 10 of these are from the same section? (Round your answer to four decimal places.)   (d) What are the mean value and standard deviation of the number among these 15 that are from the second section? (Round your mean to the nearest whole number and your standard deviation to three decimal places.) mean projectsstandard deviation projects (e) What are the mean value and standard deviation of…

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A team averaging 106 points is likely to do very well during the regular season. The coach of your team has hypothesized that your team scored at an average of less than 106 points in the years 2013-2015. Test this claim at a 1% level of significance. For this test, assume that the population standard deviation for relative skill level is unknown. Use the information in the picture to write a block of code. Here is some information that will help you write this code block. Reach out to your instructor if you need help. The dataframe for your team is called your_team_df. The variable 'pts' represents the points scored by your team. Calculate and print the mean points scored by your team during the years you picked. Identify the mean score under the null hypothesis. You only have to identify this value and do not have to print it. (Hint: this is given in the problem statement) Assuming that the population standard deviation is unknown, use Python methods to carry out the hypothesis…