To test the fairness of law enforcement in its area, a local citizens' group wants to know whetherwomen and men are unequally likely to get speeding tickets. Four hundred randomly selectedadults were phoned and asked whether or not they had been cited for speeding in the last year.Using the results in the following table and a level of significance, test the claim of the citizens'group. Let men be Population 1 and let women be Population 2.(hint - Proportions 2 sample, twotail test)Speeding TicketsTicketedNot TicketedMen21173Women37169Statistic - -2.03, Reject null hypothesisO Statistic - -3.03, Reject null hypothesisO Statistic = -2.03, Accept null hypothesisO Statistic - -5.03, Accept null hypothesis

Answered: Image /qna-images/answer/f077f718-dfad-4cfd-adcb-b463296be610.jpg

Answered: To test the fairness of law enforcement…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Please Help. Your politician friend wants to do a survey to find out the impact of a tax on wealth held by households in her community. You remember that the survey could be misleading if it interviews only 100 randomly-selected households. Why might this be?
According the the U.S. Census bureau, the percentage of Santa Ana residents with a bachelor's degree or higher is 14% and the percentage of Irvine residents with a bachelor's degree or higher is 68.5%. Suppose that the sample sizes were 1000 for the Santa Ana group and 1000 for the irvine group. Is there enough evidence to conclude that people who live in Irvine have a higher level of education compared to people living in Santa Ana?
Northside High wants to estimate the number of seniors who plan to go to a 4-year college. Answer the following. (a) Which of the following surveys probably would best represent the entire population of seniors? 20 seniors are randomly selected; 17 plan to go to a 4-year college. 20 Chess Club members are randomly selected; 14 plan to go to a 4-year college. O 20 honor roll students are randomly selected from the senior class; 18 plan to go to a 4-year college. (b) There are 500 seniors at Northside High. Using your answer from part (a), estimate the number of seniors who plan to go to a 4-year college. ☐ seniors
Cite a statistical experiment and its sample space.
The accuracy of a census report on a city in southern California was questioned by some government officials. A random sample of 1215 people living in the city was used to check the report, and the results are shown below. Ethnic Origin Census Percent Sample Result Black 10% 126 Asian 3% 31 Anglo 38% 463 Latino/Latina 41% 525 Native American 6% 58 All others 2% 12 Using a 1% level of significance, test the claim that the census distribution and the sample distribution agree.
A real-estate appraiser wants to verify the market value for homes on the east side of the city that are very similar to size and style. The appraiser wants to test the popular belief that the average sales price is $37.80 per square foot for such homes. Suppose that a random sample of six sales were selected. The sampled sales prices per square foot are $35.00, $38.10, $37.20, $29.80, $30.30, and $35.40. Assuming a normal distribution is a good model for sales, test the claim that the mean sales price per square foot differs from $37.80 at the 1% significance level.
According to the National Center for Education Statistics, 43% of the college students work full time. A survey of 900 randomly selected college students is to be conducted. For such groups of 900, would it be unusual to get 735 college students who work fulltime?
24. A group of friends compares what they receive while trick or treating. They that the average number of candy candies received is 43 with standard division of 2. What is the Z score corresponding to 20 pieces of candy. A. 10.5 B. 11.5 C. -10.5 D. -11.5
Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?
a. Identify the two different cases considered in discussing the sampling distribution of the mean sample.

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