PUB 504-Homework #8-05-25-14 Nzeogu Emmanuel
Outt – alpha in his case will be 1.65. the graph below shows the onetail distribution
Assumingwe have 95% confidence interval 10.20 falls beyond the criticalregionhencewe reject the null hypothesis. We conclude that the sociologies majorare significantly different from the student body as a whole in theaveragenumber of partiesper month.
Whatif the research question were changed to “Do sociology majorsattend a significantly greater number of parties”? How would thetest be conducted in problem 8.2A change?
H0:Sociology Majors < Student Body
Sociologymajors do not significantly attend greater number of parties permonth.
H1:SociologyMajors > Student Body
Sociologymajors onaverage oattend a significantly greater number of parties per month.
SamplingDistribution = t Alpha (α) = 0.05
t-(Critical) = +1.66
Toanswer the question, first solve for the degrees of freedom.
Degreeof Freedom = N -1
Degreeof Freedom = 116 – 1
Degreeof Freedom = 115
Withalpha =0 .05, and df = 115, the t-obtained) = 10.2044.
t-obtainedis > 1.66 Since t obtained is greater than t Critical it can beconcluded that Sociology majors do attend a significantly greaternumber of parties compared to the student body as a whole.
Percapita Property tax $130
Let H0 = $98
Assumingwe have alpha of 0.05 then our t critical tα=t0.05=2.028
Thefigure 1 below shows a two tailed normal distribution
t(obtained)-37.637.87falls within the critical region hence we reject the nullhypothesis and we conclude that there is a significant differencebetween the south eastern citiesintheaverage percapita and the other nation
57become repeat sex offender
Percentageof offender repeating (Pu)= 58/113*100=51.32%
-1.20800isnot inthe critical region hence we do not reject the null hypothesis. Weconclude that there is no significant difference between therecidivism rate of the sex offenders who completed the program andthe recidivism rate of all offenders who had been imprisoned in thestate prison system. The program did not work. It did notsignificantly decrease the recidivism rate. The sample differenceoccurred by chance only.