Using the attached dataset World_updated.sav. Two of the variables in this file (rgdp86 and
rgdp88) measure real Gross Domestic Product (GDP) per capita in 1986 and 1988 respectively.
Please conduct the appropriate t-test to answer the following question: "Is there statistically
significant evidence that per capita GDP in 1988 is different from that of 1986?
Please show your results and reasoning to justify your answer by answering the following
questions..
a. List the null hypothesis and alternative hypothesis.
b. To test the hypothesis, should you use an independent-sample t-test or paired-sample t-
test?
c. Show your SPSS outputs.
d. What are the t statistics and p-value of the t-test respectively, according to (b)?
f. Draw your conclusion on whether or not the null hypothesis in (a) should be rejected (use
a 95% significance level), based on the t-test result.