Find the critical value needed to construct a confidence interval of the given level with the given sample size. Round the answers to three decimal places. Part 1 of 4
(a) For level 95% and sample size 7.
Part 2 of 4
(b) For level 98% and sample size 12.
Part 3 of 4
(c) For level 99% and sample size 27.
Part 4 of 4
(d) For level 98% and sample size 14.

a)

b)

c)

d)

Step-by-step explanation:

Part a

The degrees of freedom are given by:

The confidence is 95% or 0.95 the significance would be and the critical values would be:

Part b

The degrees of freedom are given by:

The confidence is 98% or 0.98 the significance would be and the critical values would be:

Part c

The degrees of freedom are given by:

The confidence is 99% or 0.99 the significance would be and the critical values would be:

Part d

The degrees of freedom are given by:

The confidence is 98% or 0.98 the significance would be and the critical values would be:

answer: idk

step-by-step explanation: