Question

Determine the t-value in each of the cases Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.05 with 9 degrees of freedom. Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.15 with 28 degrees of freedom. (Round to three decimal places as needed.) le) Find the t-value such that the area left of the t-value is 0 25 with 18 degrees of freedom. JHint: Use symmetry 10 es of Round to three decimal places as needed.) (d) Find ctical t-value that corresponds to 60% cofdence. Assne 12 degrees of freedom. Round to three decimal places as needed.) the area i eft of the e t valu ents the 1-val Enter your answer in each of the answer boxes ght-Tail V G Search or type URL 8

Answer 1

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2)

Lower bound = 18

Upper = 24

So,

We know

2 * Mean = 24 + 18

Mean = 21

Also,

2 * E = 24 - 18

E = 3