Answer to Question #323326 in Statistics and Probability for Jean

Question

90%, n=23 z-score:

Answer 1

z=1.285 from table z-score

Step 1 Open table of z-score

Step 2 Find there value 0.9000

Step 3 At the table is value 0.8997 (z=1.28) and value 0.9015 (z=1.29).

Step 4. Value of z at 0.9000 will be the middle between 1.28 and 1.29. z=(1.28+1.29)/2=1.285