We use Minitab 16 Software to solve the problems.
Question #1. - Find the range, variance and standard deviation of this data set
Descriptive Statistics: NICOTINE
Variable N N* Mean SE Mean StDev Variance Minimum Q1 Median NICOTINE 500 0 0,8425 0,0155 0,3455 0,1194 0,0500 0,7000 0,9000 Variable Q3 Maximum Range NICOTINE 1,1000 1,9000 1,8500 - Create the relative frequency histogram for the nicotine level.
Graph -> Histogram -> With Fit
- Compute the interval y ± 2s y =0.8425s=0.3455y +2s=0.8425+2*0.3455=1.5335 y -2s=0.8425-2*0.3455=0.1515 Hence, the interval has the following form: (0.1515; 1.5335) - Estimate the percentage ...
