Mathematics, 21.09.2020 01:01 bellamyciana
You have tested to find whether a relationship exists between hours of sleep the night before an exam and grade on the exam. You have a participant pool of n = 28, df = 26. Your hypothesis is that a significant relationship will exist, where those with more hours of sleep receive higher grades on the exam. This is a directional hypothesis, so you run a one-tailed test, with α = 0.05. You run the numbers and find a correlation of 0.243. Doing the math, you find t = 1.278. The critical value needed is and you conclude that your correlation is .
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