t-test

Reaction times in seconds for participants with 5 hours of sleep0.190.170.20.180.130.160.210.20.140.160.150.120.160.180.21 

Reaction times in seconds for participants with 8 hours of sleep0.060.130.10.090.10.110.20.140.080.110.110.080.110.120.15

1. Explain whether the researcher should use an independent-samples t-test or a related-samples t-test for this scenario. Provide a rationale for your decision.
2. Identify the independent variable and dependent variable.
3. Knowing the researcher believes that people who sleep less will have slower reaction times, state the null hypothesis and alternate hypothesis in words (not formulas).
4. Explain whether the researcher should use a one-tailed test or two-tailed test and why.
5. Identify the obtained t value for this data set using SPSS and report it in your answer document.
6. State the degrees of freedom and explain how you calculated it by hand.
7. Explain whether the researcher should retain or reject the null hypothesis. Provide a rationale for your decision. Are the results statistically significant?
8. Explain what the researcher can conclude about the relationship between amount of sleep and reaction times.