homework help pleaseee?

Question

the time in seconds it takes for 12 sewing machines (N=12) to stitch a border into a particular garment is shown in the table. Compute the mean stitching time and the standard deviation to the nearest tenth.

 

67,58,62,60

69,71,57,63

60,64,65,72

Answer 1

Either do this by hand calculation using the data presented, along with the well known formulas and procedures, or

key the data into a graphing calculator and have the calculator do 1-variable statistics, by pressing the appropriate option keys in the STATS menu.