For this study, we should use     The null and alternative hypotheses would be:      Ho:            (please enter a decimal)     H1:            (Please enter a decimal) The test statistic     =  (please show your answer to 3 decimal

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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The recidivism rate for convicted sex offenders is 14%.  A warden suspects that this percent is different if the sex offender is also a drug addict. Of the 324 convicted sex offenders who were also drug addicts, 32 of them became repeat offenders. What can be concluded at the αα = 0.05 level of significance?

  1. For this study, we should use    
  2. The null and alternative hypotheses would be:    
     Ho:            (please enter a decimal)   
     H1:            (Please enter a decimal)
  1. The test statistic     =  (please show your answer to 3 decimal places.)
  2. The p-value =  (Please show your answer to 4 decimal places.)
  3. The p-value is     αα
  4. Based on this, we should      the null hypothesis.
  5. Thus, the final conclusion is that ...
    • The data suggest the populaton proportion is significantly different from 14% at αα = 0.05, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts who become repeat offenders is different from 14%.
    • The data suggest the population proportion is not significantly different from 14% at αα = 0.05, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts who become repeat offenders is equal to 14%.
    • The data suggest the population proportion is not significantly different from 14% at αα = 0.05, so there is statistically insignificant evidence to conclude that the population proportion of convicted sex offender drug addicts who become repeat offenders is different from 14%.
  6. Interpret the p-value in the context of the study.
    • If the population proportion of convicted sex offender drug addicts who become repeat offenders is 14% and if another 324 convicted sex offender drug addicts are observed then there would be a 3.24% chance that either fewer than 10% of the 324 convicted sex offender drug addicts in the study become repeat offenders or more than 18% of the 324 convicted sex offender drug addicts in the study become repeat offenders.
    • There is a 3.24% chance of a Type I error.
    • If the sample proportion of convicted sex offender drug addicts who become repeat offenders is 10% and if another 324 convicted sex offender drug addicts are observed, then there would be a 3.24% chance that we would conclude either fewer than 14% of all convicted sex offender drug addicts become repeat offenders or more than 14% of all convicted sex offender drug addicts become repeat offenders.
    • There is a 3.24% chance that the percent of all convicted sex offender drug addicts become repeat offenders differs from 14%.
  7. Interpret the level of significance in the context of the study.
    • If the population proportion of convicted sex offender drug addicts who become repeat offenders is different from 14% and if another 324 convicted sex offender drug addicts are observed then there would be a 5% chance that we would end up falsely concluding that the proportion of all convicted sex offender drug addicts who become repeat offenders is equal to 14%.
    • If the population proportion of convicted sex offender drug addicts who become repeat offenders is 14% and if another 324 convicted sex offender drug addicts are observed, then there would be a 5% chance that we would end up falsely concluding that the proportion of all convicted sex offender drug addicts who become repeat offenders is different from 14%.
    • There is a 5% chance that Lizard People aka "Reptilians" are running the world.
    • There is a 5% chance that the proportion of all convicted sex offender drug addicts who become repeat offenders is different from 14%.
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