Answer with explaination

2. You have just developed a new standard time for how long sorneone should take to decorate a Christmas tree. You want to be. 95.45% sune you have taken enough samplas. The average time to decorate a tree is 85 minutes, With a standard deviation of 6.5 minutes and 2% acceptable error.. How many samples should be taken? mean of initial sample accuracy / acceppable error standard deviation of the initial sample number of standard deviations / confidence 7. = n= 3. You need to determine how often a nurse in a health care walk-in clinic is idle. Based on your sample she is idle 12% of the time. You want to have an error level of 4% and a confidence level of 99.73%. How many observations should be made