Finding t_α/2
Note: t_α/2 is a t-score corresponding to right-tailed area of α/2.

Input Level of Confidence (%) =

Input Sample Size (n) = or Degrees of Freedom (DF) =

Calculating Mean and Standard Deviation

How To Video

Input Data:(Use Tab or 'Arrow' keys on keyboard to help with data input.)

....................

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Column 7

Column 8

Column 9

Column 10

Column 11

Column 12

Column 13

Column 14

Column 15

Column 16

Column 17

Column 18

Column 19

Column 20

Column 21

Column 22

Column 23

Column 24

Column 25

Column 26

Column 27

Column 28

Column 29

Column 30

Column 31

Column 32

Column 33

Column 34

Column 35

Column 36

Column 37

Column 38

Column 39

Column 40

Column 41

Column 42

Column 43

Column 44

Column 45

Column 46

Column 47

Column 48

Column 49

Column 50

Row 1

Row 2

Row 3

Row 4

Row 5

Row 6

Row 7

Row 8

Row 9

Row 10

Row 11

Row 12

Row 13

Row 14

Row 15

Row 16

Row 17

Row 18

Row 19

Row 20

Row 21

Row 22

Row 23

Row 24

Row 25

Row 26

Row 27

Row 28

Row 29

Row 30

Row 31

Row 32

Row 33

Row 34

Row 35

Row 36

Row 37

Row 38

Row 39

Row 40

Row 41

Row 42

Row 43

Row 44

Row 45

Row 46

Row 47

Row 48

Row 49

Row 50

or