A researcher wants to know the relationship between murder and robbery. The researcher recorded the number of murders and robberies per 100,000 population for a random selection of cities.

Question 4

A researcher wants to know the relationship between murder and robbery. The researcher recorded the number of murders and robberies per 100,000 population for a random selection of cities. Help the researcher to find the relationship between the two variables.

Murders, x 2.4 2.7 5.6 2.6 2.1 3.3 6.6 5.7
Robberies, y 25 14 151 91 80 49 173 96

a. Calculate the correlation coefficient, R. Interpret the calculated value of R.
b. Briefly comment on the relationship between the two variables based on the correlation
coefficient, R.        (1 Mark)
c. Calculate the slope, b.
d. Calculate the intercept, a.
e. Write the regression equation.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Question 4 A researcher wants to know the relationship between murder and robbery. The researcher recorded...

Question 4 A researcher wants to know the relationship between murder and robbery. The researcher recorded the number of murders and robberies per 100,000 population for a random selection of cities. Help the researcher to find the relationship between the two variables. Murders, x 2.4 2.7 5.6 2.6 2.1 3.3 6.6 5.7 Robberies, y 25 14 151 91 80 49 173 96 a. Calculate the correlation coefficient, R. Interpret the calculated value of R. b. Briefly comment on...

You are a researcher who wants to know if there is a relationship between variable Y...

You are a researcher who wants to know if there is a relationship between variable Y and variable X. You hypothesize that there will be a strong positive relationship between variable Y GPA and Variable X hours of sleep. After one semester, you select five students at random out of 200 students who have taken a survey and found that they do not get more than 5 hours of sleep per night. You select five more students at random from...

3. A researcher wants to know if there is a relationship between having death-penalty statutes and...

3. A researcher wants to know if there is a relationship between having death-penalty statutes and having three-strikes laws in place. Based on the information regarding these laws in US states…[Hint: calculated chi-square should be 4.160] Death Penalty Three-strikes law Yes No Yes 19 2 No 19 10 Formulate the null and research/alternative hypotheses. Calculate the chi-square Report the critical chi-square at the corresponding probability level [.05]and degrees of freedom Test the null hypothesis and reach a statistical conclusion; Interpret...

Subjects