Question: Conduct a paired-samples t-test if D = 28.20, s D = 145.91, and n D = 81. a. What is the null hypothesis? b. What

Conduct a paired-samples t-test if D = 28.20, sD = 145.91, and nD = 81.

a. What is the null hypothesis?

b. What would the α value be for this NHST?

c. Is a one- or a two-tailed hypothesis appropriate for this scenario? Justify your response.

d. What is the alternative hypothesis for this paired-samples t-test?

e. Calculate the degrees of freedom in this example.

f. Find the tcrit value.

g. Calculate the tobs value for the data.

h. Should you reject or retain the null hypothesis?

i. Calculate Cohen’s d for these data, using the equation in Sidebar 9.2.

j. Find a p-value for these data.

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