Question

Use the calculator provided to solve the following problems. • Consider a t distribution with 28 degrees of freedom. Compute P(t>-1.24). Round your answer to at least three decimal places. • Consider a t distribution with 7 degrees of freedom. Find the value of c such that P(-c<t<c)=0.99. Round your answer to at least three decimal places. P(t2 - 1.24) = 0 c = 1 xs ?

Answer 1

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1.

df = 28
P(t>=-1.24, at df = 28) =
= T.DIST(-1.24,28,TRUE)
= 0.1126

2.

df = 7
P(-c<t<c) = .99 or
1 - P(-c<t<c) = 1-.99
= 2*P(-c<t) = .01
P(-c<t) = .005
-c = -3.499
c = 3.499