Reference no: EM132330130

Assignment - Use the data to answer the following questions:

Assess the Normality of the variables Distance and LeadBefore, describe the measure you used to assess Normality, give your interpretation of the measure and give your final conclusions. If you decide that either/ both of the variables are non - Normal then state which transformation you applied (if any) to obtain a variable for which Normality can be assumed and what your conclusions are regarding the transformation(s).

1.1 Calculate the most appropriate descriptive statistics for Distance and LeadBefore.

1.2 Compare the mean and median value for each variable. Give an explanation for your answer.

1.3 Give a practical interpretation of the measure of variability that you calculated for each variable.

2. Create a new variable DistCat by grouping the values of Distance into categories as follows:

Label the categories of the variable DistCat.

Print out the data set. [Hint: choose Print from the file menu while you are in the spreadsheet/data window.]

Print the summary file information that is the variable contained in the data set and their labels.

[Hint: choose file info from the utilities menu.]

Note: this is not the only output you should submit with your assignment, all relevant output is to be included.

3. What percentage of the participants is male?

4. Give a point estimate for the mean Cigarette in the population.

5.1 Obtain 90%, 95% and 99% confidence intervals for the population mean Cigarette value.

5.2 Compare the lengths of the three intervals and give an explanation for your answer.

5.3 What difference would we expect to observe in the 95% confidence interval if the sample size was larger? Give a reason for your answer.

5.4 Describe in your words your interpretation of the 95% confidence interval for Cigarette.