Need help. Asap. I suck at graphs.
2 answers:
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Here you go. just put the equation into a table
Answer:
With regard to intelligence scores, at 95% confidence level, there is significant evidence to conclude that violent offenders are less intelligent than property offenders
Step-by-step explanation:
H_a: Violent offenders are less intelligent than property offenders
H_o: Violent offenders and property offenders do not differ significantly with regard to intelligence scores
Test statistic can be found using the formula
z= where
- X is the mean IQ score of property offenders (96)
- Y is the mean IQ score of violent offenders (88)
- s(x) is the sample standard deviation of property offenders (8.5)
- s(y) is the sample standard deviation of violent offenders (7.5)
- N(x) is the sample size for property offenders (225)
- N(y) is the sample size for violent offenders (200)
then z= ≈10.3
One tail p-value of the test statistic is < 0.00001
Since p-value<0.05 (significance level) we reject the null hypothesis.