Question

Mu	Sig	Z	X
252	31	1.24		FALSE
394	12	0.74		FALSE
637	80	-1.59		FALSE
-157	147	-1.98		FALSE
838	43	2.03		FALSE
590	18	-1.59		FALSE
639	70	-0.51		FALSE
777	10	1.67		FALSE
113	2	2.32		FALSE
463	15	-2.49		FALSE
102	19	-1.99		FALSE
Instructions:	Record values for X. Don't round column D

Answer 1

Solution:

We have to find X values for given Mean , Standard Deviation and z values.

We use following formula to find x:

Lets consider first row:

Mean = SD = and z = 1.24

Thus

Thus using same steps we get next x values as below:

Mu	Sig	Z	X
252	31	1.24	290.44	FALSE
394	12	0.74	402.88	FALSE
637	80	-1.59	509.8	FALSE
-157	147	-1.98	-448.06	FALSE
838	43	2.03	925.29	FALSE
590	18	-1.59	561.38	FALSE
639	70	-0.51	603.3	FALSE
777	10	1.67	793.7	FALSE
113	2	2.32	117.64	FALSE
463	15	-2.49	425.65	FALSE
102	19	-1.99	64.19	FALSE