Question

Consider the data below of inches of rainfall per month for two different regions in the Northwestern United States:

	Plains	Mountains
April	25.3	13.6
May	17.5	18.1
June	19.0	15.3
July	17.4	13.4
August	16.7	14.0

Using SPSS, perform a two-sample t-test against the hypothesis that there is not the same amount of rainfall in both regions in the Northwestern United States with a significance level of 0.025. You do not need to test Normality first. In the output, the first test in the table (Levene’s Test for Equality of Variances), concerns whether the variances of the populations are equal (the null hypothesis) or not (the alternative hypothesis); use the significance (P-value) of this test to determine in which row to look for your test of means. If parts of your table do not export, you can copy and paste it to preserve the test statistic and significance from SPSS, or transcribe both of them (and include what does export from the SPSS output). What are the degrees of freedom of your test statistic (using either the formula from the book or the output from the proper row)?

Please provide step by step solution from SPSS.

Answer 1