Researchers know that the average rate of violence within intimate relationships

Question

Researchers know that the average rate of violence within intimate relationships is 20 men or women per minute in the US (SD=2.47), according to the National Coalition against Domestic Violence (NCADV). The local chapter of the NCADV is concerned about area rates of domestic violence because the local average is 23.20 (N=265). They would like to determine if the local rate is the same as the national rate.

F. What are the df (Please show work)

G. What is the critical value for p=.05 (please show work)

H. If the researchers calculate a test statistic of 1.78, should they?    Retain H0 or Reject H0

I. Interpret the findings (please write findings in APA format)

Explanation / Answer

Sample size = n = 265

F) df = n - 1 = 265 - 1= 264

G) Critical value = 1.969 ( Using excel function =TINV(0.05,264))

H) Test statistic t = 1.78

t < 1.969 we Retailn H0

I) Interpretation: The average rate of violence within intimate relationships is 20 men or women per minute in the US.

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