In this problem, assume that the distribution of differences is approximately no

Question

In this problem, assume that the distribution of differences is approximately normal. The artifact frequency for an excavation of a kiva in Bandelier National Monument gave the following information. Does this information indicate that there tend to be more flaked stone tools than nonflaked stone tools at this excavation site? Use a 10% level of significance. (Let d = flaked - nonflaked.) What is the level of significance? ________ State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? H_0: mu_d = 0; H_1: mu_d; > 0; right-tailed H_0: mu_d = 0; H_1: mu_d;

Explanation / Answer

a)

level of significance = 0.10

ho: u_d = 0; h1: u_d > 0; right tailed

b)

students t. assumed Is approximately normal

t= 1.706

c)

p-value = 0.0655

Difference Scores Calculations

Mean: 5.12
= 0
S2 = SSdf = 502.88/(8-1) = 71.84
S2M = S2/N = 71.84/8 = 8.98
SM = S2M = 8.98 = 3.00

T-value Calculation

t = (M - )/SM = (5.12 - 0)/3.00 = 1.71

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