z value at 90% = 1.645
s = 4
n =18
Error bound = z *(s/sqrt(n))
= 1.645 *(4/sqrt(18))
= 1.551
2010 Week 6 Assignment: Confidence Interval for Mean - Population Stan- dard Deviation Known Home Sylabus...
Week 6 Assignment: Confidence Interval for Population Mean- Population Standard Deviation Known Question supplement bottle is 16 pills. If we want to be 95 % confident The population standard deviation for the number of pills that the sample mean is within 5 pills of the true population mean, what is the minimum sample size that should be taken? in a Zo,01 Z0,005 Zo.10 Zo.05 Zo025 2.576 2.326 1.645 1.960 1.282 Use the table above for the z-score, and be sure...