The discussion revolves around solving normal distribution problems, specifically those that require values outside the standard Z-table range, which typically spans from -3 to 3. The original poster expresses confusion regarding how to handle problems that involve Z-scores like -4.5.
There is an ongoing exploration of resources that could assist in finding probabilities for extreme Z-scores. Some participants have provided links to websites that offer extended tables and interactive calculators, indicating a productive direction in the discussion.
The original poster notes that their textbooks only provide Z-tables from -3 to 3, which raises questions about how to approach problems requiring Z-scores outside this range. This limitation is a central point of discussion.
Nenad said:what are you talking about? Be more specific.
Regards,
Nenad
There are several options. Web Site #1 below offers interactive calculation of both Normal Distribution and Inverse Normal Distribution for {-7.0 < z < +7.0}. Web Site #2 provides tabulated values of Normal Distribution tail probabilities for {0 < z < +9.5}, with larger "z" values given in the extended table below the main table. Finally, you can calculate your own Normal Distribution CDF's from Equations #10-14 and other references given in Web Site #3 below.semidevil said:the only tables that I see go from -3 to 3 in my textbooks. but I keep seeing problems on the textbooks tha ask for p( -4.5 < z < .5)
how do I solve this?