1. The figure below depicts six curves:

Which, if any, of the curves in the figure above look(s) like a normal curve? If the curve is a NOT normal curve, tell why.
2. The diagram below depicts three normal curves

1. _______ Which curve has the smallest mean?
2. _______ Which curve has the smallest standard deviation?
3. _______ What is the mean for curve A?
4. _______ What is the apparent mean for curve B?
3. I jog from the College to Kolonia in a mean time µ = 61 minutes with a standard deviation s = 7 minutes. My times are normally distributed about the mean.
1. _______ What is the probability that a run will take less than 61 minutes?
2. _______ What is the probability that a run will take more than 68 minutes?
3. _______ If I run 50 runs home during 2001, how many runs would be expected to last between 54 minutes and 68 minutes?
4. Use µ = 61 and s = 7 to convert x = 51 minutes to a z value.
Statistic or Parameter Symbol Equations Excel
Normal Statistics
Calculate a z value from an x z = =STANDARDIZE(x, µ, s)
Calculate an x value from a z x = s z + µ =s*z+µ
Calculate a z-statistic from an x z =(x - µ)/(sx/SQRT(n))