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. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer.

The artifact frequency for an excavation of a kiva in Bandelier National Monument gave the following information.

11. ÷ -I8 points BBUnderStat1 18.4.016. My Notes Ask Your Te In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer The artifact frequency for an excavation of a kiva in Bandelier National Monument gave the following information. Stratum Flaked Stone Tools 10 Nonflaked Stone Tools 6 38 51 25 32 30 12 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.) (a) What is the level of significance? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? Ho: fd > 0; HI : 0; right-tailed HO: gld = 0; H1: 0; right-tailed (b) What sampling distribution will you use? What assumptions are you making? The Student's t. We assume that d has an approximately uniform distribution The standard normal. We assume that d has an approximately normal distribution. The Student's t. We assume that d has an approximately normal distribution The standard normal. We assume that d has an approximately uniform distribution.

Explanation / Answer

Two-Sample T-Test and CI: Flaked, Non-Flaked

Method

Equal variances are not assumed for this analysis.

Descriptive Statistics

Estimation for Difference

Test

a)option C) is correct

b) option C)

TS = 0.64

c) p-value = 0.267

correct graph - option C)

d) since p-value> 0.10 , we fail to reject the null

option C)

e) option D) is correct

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: mean of Flaked µ: mean of Non-Flaked Difference: - µ

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