Which of the following methods can be used for decision making under uncertainty but without probability? A. Maximin criterion. B. Equally likely criterion. C. Savage criterion. D. Decision trees.
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5. Which of the following methods can be used for decision making under uncertainty but without
A. Maximin criterion.
B. Equally likely criterion.
C. Savage criterion.
D. Decision trees.
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- urvey of a group's viewing habits over the last year revealed the following (ii) 29% watched baseball (iv) 14% watched gymnastics and baseball ormation: 28% watched gymnastics; 19% watched soccur; 12% watched baseball and soccur; ) 8% watched all three sports d the percentage of the group that watched none of the three sports during the last r. (vì) 10% watched gymnastics and soccurA charity is trying to raise money by hosting a comedy club with a famous comedian. In order to maximize donations they want to bring in the best comedian, if there is one. By surveying 100 of their target donors, they find the following preferences: Comedian Zach Galifianakis Maria Bamford Patton Oswalt Brian Posehn Number of Preferences 11 44 23 22 They are trying to determine who (if anyone) should be invited. Which statistical test(s) are appropriate for this problem? (Select all that apply) Single-mean Z-test Single-mean t-test Single-proportion Z-test Chi-square test for goodness of fit Two-mean Z-test Two-mean t-test None of the aboveWhen two births are randomly selected, the sample space for genders is bb, bg. gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion an unbiased estimator of a population proportion? For the entire population, assume the probability of having a boy is the probability of having a girl is , and this is not affected by how many boys or girls have previously been born. 2 Determine the probabilities of each sample proportion. Probability Sample proportion of girls Tune intanare or cimnlifiad frartinne
- How would I solve this?In the example from lecture concerning making community service a requirement, suppose the percentages had been exactly the same, but the sample sizes were 4 times as big: 180 out of 360 students (50%) at the first school are in favor168 out of 400 students (42%) at the second school are in favor What is the new p value? Choose the value that is closest. a. 0.7% b. 1.4% c. 2.2% d. 2.8%The table below gives beverage preferences for random samples of teens and adults. We are asked to test for independence between age (i.e., adult and teen) and drink preferences. This problem is an example of a Teens Adults Coffee 50 200 E!! Tea 100 150 Soft 200 200 Drink Other 50 50 Select one: O a. normally distributed variable O b. test for independence O c. binomial distributed variable O d. multinomial population
- Quasi-experimental designs classify cases by: a. manipulating independent variables of interest. b. using the naturally occurring status of participants. c. manipulating dependent variables of interest d. using random assignmentWhat statistical test would a researcher use to test the following research hypothesis: Individuals who report less favorable attitudes toward the police are more likely to be sentenced to higher security prisons. Attitudes measured as 1 = very favorable, 2 = somewhat favorable, 3 = somewhat not favorable, and 4 = not at all favorable. Sentences measured as 1 = minimum, 2 = medium, and 3 = maximum.A clinical psychologist is interested in determining which type of therapy is in fact more effective at treating depression. The psychologist randomly assigns 1/3rd of the participants to receive cognitive behavioral therapy, 1/3rd to receive the psychodynamic therapy and 1/3rd to receive humanistic therapy. Following the therapy sessions, the psychologist gives the members of each group the Beck Depression Inventory and compares the scores of the three groups. 1 What hypothesis test would be most appropriate for answering this research question and why? 2 If the researcher found that at least one of groups differed, what type of follow-up test would be most appropriate? 3 What are the independent and dependent variables (if any)?
- A retailer is looking to evaluate its customer service. Management has determined that if the retailer wants to stay competitive, then it will have to have at least a 91% satisfaction rate among its customers. Management will take corrective actions if the satisfaction rate falls below 91%. They conduct a survey to determine if the satisfaction rate is lower than 91%. A survey of 1,450 customers showed that 1,305 were satisfied with their customer service. (a) Give the test statistic. (Round to two decimal places.) (b) Give the p-value (Round to three decimal places.) (c) State whether or not the management should take corrective action, based on a 5% significance level. Explain briefly.Westminster Financial has released a summary of investor and investment package information from the past fiscal year. During this time, Westminster provided a choice among 12 pre-designed investment packages. The investment packages were classified according to two variables: riskiness of investment package chosen ("Risky", "Moderate/mixed", and "Conservative") and age of investor ("Under 35", "35-49", or "50+"). Suppose that we're interested in the possible relationship between the age of the investor and the riskiness of the investment package the investor chose. The following contingency table gives a summary of the information released by Westminster regarding age and riskiness of investment package for 150 investors. In the cells of the table are the respective observed frequencies, and three of the cells also have blanks. Fill in these blanks with the frequencies expected if the two variables, riskiness of investment package chosen and age of investor, are independent. Round…Dataset: NES. Variables: spend8, nesw.) The NES dataset contains spend8, which records the number of government policy areas where respondents think spending should be increased. Scores range from 0 (the respondent does not want to increase spending on any of the policies) to 8 (the respondent wants to increase spending on all eight policies). The NES, of course, polls a random sample of U.S. adults. In this exercise you will analyze spend8 using the Analyze ▶ Compare Means ▶ One-Sample T Test procedure. You then will draw inferences about the population mean. Make sure you weight observations using the nesw variable so your results are nationally representative. A. The spend8 variable has a sample mean of ______.