Find the critical value

t

/

2

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

80

%

and sample size6

Critical

value

=

Part 2 of 4

(b) For level

95

%

and sample size10

Critical

value

=

Part 3 of 4

(c) For level

90

%

and sample size26

Critical

value

=

Part 4 of 4

(d) For level

99.5

%

and sample size12

Critical

value

=