8.12 CJ A random sample of 113 convicted rapists ina state prison system completed a program de-signed to change their attitudes towards women,sex, and violence before being released on pa-role. Fifty-eight eventually became repeat sex of-fenders. Is this recidivism rate significantly dif-ferent from the rate for all offenders in that state(57%)? Summarize your conclusions in a sen-tence or two. (HINT: You must use the informa-tion given in the problem to compute a sampleproportion. Remember to convert the populationpercentage to a proportion.) 8.8 SOC A school system has assigned several hundred"chronic and severe underachievers" to an altema-tive echucational experience. To assess the program,a random sample of 35 has been selected for com-parison with all studkents in the system.a. In terms of GPA, did the program work?Systemwide GPAProgram GPAX = 2.55s= 0.70N= 354 = 2.47b. In terms of absenteeism (number of daysmissed per year), what can be said about thesuccess of the program?SystemwideProgramu - 6.137X= 4.78s= 1.11N= 35c. In terms of standardized test scores in mathand reading, was the program a success?Math Test-Math Test-SystemwideProgramH = 103X = 106s= 2.0N- 35Reading Test-SystemwideReading Test-ProgramX = 113s= 2.0N= 35A = 110(HINT: Note the wording of the research ques-tions. Is a one-tailed test justified? Is the programa success if the students in the program are nodifferent from students systemwide? What if theprogram students were performing at lower lev-els? If a one-tailed test is used, what form shouldtbe research bypotbesis take? Where will the criti-cal region begin?)

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A z-test for one proportion is a hypothesis test that attempts to make a claim about the population…

Math

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8.12 C A random sample of 113 convicted rapists in a state prison system completed a program de- signed to change their attitudes towards women, sex, and violence before being released on pa- role. Fifty-eight eventually became repeat sex of- fenders. Is this recidivism rate significantly dif- ferent from the rate for all offenders in that state (57%)P Summarize your conclusions in a sen- tence or two. (HINT: You must use the informa- tion given in tbe problem to compute a sample proportion. Remember to convert the population percentage to a proportion.)

8.12 C A random sample of 113 convicted rapists in a state prison system completed a program de- signed to change their attitudes towards women, sex, and violence before being released on pa- role. Fifty-eight eventually became repeat sex of- fenders. Is this recidivism rate significantly dif- ferent from the rate for all offenders in that state (57%)P Summarize your conclusions in a sen- tence or two. (HINT: You must use the informa- tion given in tbe problem to compute a sample proportion. Remember to convert the population percentage to a proportion.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Homser Lake, Oregon, has an Atlantic salmon catch-and-release program that has been very successful. The average fisherman's catch has been ? = 9.0 Atlantic salmon per day. Suppose that a new quota system restricting the number of fishermen has been put into effect this season. A random sample of fishermen gave the following catches per day:12 6 11 12 5 0 27 8 7 6 3 12 12 I need help with (b) and the value of the sample test statistic
Suppose the manager agrees to pay each employee a$50bonus if they meet a certain goal. On a typical Saturday, the oil-change facility will perform 35 oil changes between 10 A.M. and 12 P.M. Treating this as a random sample, at what mean oil-change fime would there be a10%chance of being at or below? This will be the goal established by the manager. There would be a10%chance of being at or below minutes.
determine the degrees of freedom if necessary
The 2006 Statistical Abstract of the United States reports on a survey that asked a national sample of 80,000 American households about pet ownership. Suppose (for now) that one-third of all American households own a pet cat. Still supposing that one-third of all American households own a pet cat, between what two values do you expect 95% of all sample proportions to fall?
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
2. The following are the numbers of minutes it took random samples of 8 men (group 1) and 5 women (group 2) to complete a written test given for the renewal of their driver's licences Men : 9.9, 7.4, 8.9, 9.1, 7.7,9.7, 11.8, 9.2 Women : 8.6, 10.9, 9.8, 10.7, 9.4 Use a nonparametric test to decide whether to accept the null hypothesis µ1 Hz against the alternative µ1 # µz at 0.05 level of significance.
Monthly salary computations from two different clothing companies yielded the following data: n=7, ?=9,130$, ?=386$; ?= ?, ?=8,840$, ?=212$. At the level of significance 0.05, can we conclude that the mean monthly salary from the two companie is not the same?
1. In the state of Pennsylvania 12% of students submit box tops for education to their school. A large school district in westem Pennsylvahia runs a contest to see if they can increase participation. The superintendent takes a random sample of 210 students from the district and finds that 35 have submitted box tops this year. (a) Do these data provide convincing evidence that the contest has increased participation in the box tops for education program? (b) Interpret the P-value from part (a).
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