I only need f answered below You are a director of a treatme

I only need f.) answered below

You are a director of a treatment program for juvenile offenders. You are writing a grant to receive additional funding and want to show that the youth that you serve have more severe problems than the general population. You recently read an article that reports the average age of 1^stalcohol use is 15 years of age. You use this information to conduct a one-sample t-test using SPSS. The output is as follows:

One-Sample Statistics

N

Mean

Std. Deviation

Std. Error Mean

age of 1st alcohol use

424

12.18

2.650

.129

One-Sample Test

Test Value = 15

t

df

Sig. (2-tailed)

Mean Difference

95% Confidence Interval of the Difference

Lower

Upper

age of 1st alcohol use

-21.919

423

.000

-2.821

-3.07

-2.57

a.What was the sample size you used?

424

b.What was the average age of 1^st alcohol use in the sample? 12.18

c.What is the null hypothesis you are testing? Null hypothesis: H0:15

d.What is the research hypothesis? Research hypothesis: H1: <15

e.Based on the results, what is your decision regarding the null hypothesis? Why or how did you arrive at this decision? The p- value is: 0.0000 It is observed that, the p – value is less than the significance level so we reject null hypothesis.

f.)How would you use the results from the t-test to bolster your argument for additional money for the treatment program?

Solution

Solution:

t calculated =-21.919

degrees of freedom=423

level of significance=0.05

since the calc value of -21.919 does not fall in range

Reject null hypohesis

Accept alternate hypothesis.

there is significant diff between the means of two populations.

the average age of 1st alcohol use is 1less than 5 years of age.  

he youth that you serve have more severe problems than the general population.