The nternational Ar Tranport Asedation urves buiness travelers to develop oality ratings for transatantic pateway airports. The maimum possible rating is 10. Suppose a simple random sample fs0 businesi travelers is selected and each traveler is aed toprevide arating for the Hami tenational Arport. The ratings obtained from the sample of 50 business travelers folow. 10 10 10 6 7 ? ...1 0 s3 10 10 10 10 Developa conndence nterval estimateof the ptionmean ating for Hami. Round your anwers to two dedimal places.
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- Each student in a statistics class was asked to randomly select a number from 1 to 10. The graph below summarizes their choices. The height of the bar above a number indicates the percentage of students in the class that chose that number (the actual percentage is shown above the bar). A) what is the median of all the numbers selected by the students? B) what is the first quartile Q1 of all the numbers selected by the students? What is the third quartile Q3 of all the numbers selected by the students?2. Below is data on the number of vehicles involved in a fatal crash and city in California during 2019. City Single-ve Two-vehicle hicle crash fatalities Los Angeles 175 San Diego 61 San Jose San Francisco Fresno 49 22 33 Sacramento 28 Long Beach 26 crash fatalities 69 19 19 a 13 2. Is there enough evidence to support that the number of vehicles involved in a crash is related to the city in which the accident occur? null and alternate hypotheses test statistic, critical value and/or p-value expected counts reject or fail to reject the null hypothesis ● conclusion in plain English2. We want to investigate whether there exists gender bias on traffic stops by the police here in Charlotte. The Charlotte Open Data Portal includes information on different characteristics of drivers being stopped. We collected the data from 2017 and we are interested in answering the question: "Of all the drivers who are stopped, are female drivers less likely to get searched than male drivers? From the data collected we observed that 438 out of the 24,314 female drivers were searched, whercas 2,244 out of 34,095 male drivers were scarchcd. (a) that the proportion of female drivers being searched is smaller than the proportion of male drivers being searched? Is there sufficient evidence at the 0.05 significance level to conclude Construct the appropriate confidence interval for the hypothesis (b) test of part (a) and state your conclusion.
- 5) There are two car dealers in town. The mean monthly sales at Smith Auto and Jones Cars are about the same. However, Kevin Smith, owner of Smith Auto, believes his sales are more consistent. a) State the Hypothesis to show the variation in the monthly sales is lower at Smith Auto than Jones Cars s. b) To test the hypothesis, you collect monthly sales data for the two companies. The data appears below. Use JMP to test the hypothesis of part a). c) Using alpha= 0.05, draw a conclusion for the hypothesis test and state the conclusion in the context of the problem. Dealership Sales Smith Auto 98 Smith Auto 78 Smith Auto 54 Smith Auto 57 Smith Auto 68 Smith Auto 64 Smith Auto 70 Jones Cars 75 Jones Cars 81 Jones Cars 81 Jones Cars 30 Jones Cars 82 Jones Cars 46 Jones Cars 58 Jones Cars 101A manager of a certain cargo company reported that his company has delivered 8453 packages during the month of January. Based on this information he also claimed that his company would deliver 124,400 packages during the year. уear. Determine whether the manager's claim is an example of a descriptive statistic or an example of an inferential statistic.To begin answering our original question, test the claim that the proportion of children from the low income group that drew the nickel too large is greater than the proportion of the high income group that drew the nickel too large. Test at the 0.01 significance level.Recall 23 of 40 children in the low income group drew the nickel too large, and 12 of 35 did in the high income group.a) If we use LL to denote the low income group and HH to denote the high income group, identify the correct alternative hypothesis. H1:pL≠pHH1:pL≠pH H1:pL>pHH1:pL>pH H1:pL<pHH1:pL<pH H1:μL<μHH1:μL<μH H1:μL>μHH1:μL>μH H1:μL≠μHH1:μL≠μH b) The test statistic value is: c) Using the P-value method, the P-value is: d) Based on this, we Reject H0H0 Fail to reject H0H0 e) Which means There is sufficient evidence to warrant rejection of the claim There is not sufficient evidence to warrant rejection of the claim The sample data supports the claim There is not sufficient evidence…
- O POOR MAN'S LASAGNA MELTI X ts itslearning sign-in page 6. https://assignment.itslearning x C Clever | Portal O HISD On Track A student.schoolcity.com/studenthisd/Common/Index 20-21_HISD_SNAP1_HS_MTH_E_ALG1-P1-Nov9-12 [12 Items] V Duah, Olivia 9 10 1-12 Q -N e Save 1. A student graphed f(x) = x and g(x) = -51(x) + 2 on the same coordinate grid. Which statement describes one relationship for how the graphs of f(x) and g(x) are related? O The graph of f(x) is translated 5 units down to create the graph of g(x). O The graph of f(X) is less steep than the graph of g(x). O The graph of f(x) is translated 5 units up to create the graph of g(x). The graph of f(x) is steeper than the graph of g(x). Time Remaining: 02:55:15 Copyright © 2020 Illuminate Edu O Type here to search no home f9 O f10 3 f12 f11 f2 f3 O f4 D f5 O f6 D f7 00 f8 f1 8 @ # $ 7 8. 9. 2 4 4 5 Y W#1Five big personality tests are standardized so that the average score is 100 for the entire group of people who take the test each year. However, if we selected a group of 40 people who took the test and computed their average test score, we probably would not get 100. What statistical concept explains the difference between the group mean and the mean for the entire group? Lütfen birini seçin: A. descriptive error B. statistical error C. sampling error D. inferential error
- .Seven instructors are rated by first and seconf year students on “clarity of presentation” and the results are tabulated. Is there a significant correlation between the ratings of freshmen and sophomores on the clarity of presentation of theseveninstructors? Intructor Freshmen Sophomores 1 44 58 2 39 42 3 36 18 4 35 22 5 33 31 6 29 38 7 22 38Construct a sample (with at least two differentvalues in the set) of 66 measurements whose median is smaller than the smallest measurement in the sample. If this is not possible, indicate "Cannot create sample".Which of the following is the appropriate conclusion?A) There is insufficient evidence that the mean number of sets they played in their fourth year of competition is higher than the mean number of sets they played in their first year of competition. B) There is sufficient evidence that the mean number of sets they played in their fourth year of competition is higher than the mean number of sets they played in their first year of competition. C) There is sufficient evidence that the mean number of sets they played in their fourth year of competition is the same as the mean number of sets theyplayed in their first year of competition. D) There is sufficient evidence that the mean number of sets they played in their fourth year of competition is the same as the mean number of sets they played in their first year of competition.