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
normal curve, tell why.
The diagram below depicts three normal curves
_______ Which curve has the smallest mean?
_______ Which curve has the smallest standard deviation?
_______ What is the mean for curve A?
_______ What is the apparent mean for curve B?
I jog from the College to Kolonia in a mean time µ = 61 minutes with a standard deviation
= 7 minutes. My times are normally distributed about the mean.
_______ What is the probability that a run will take less than 61 minutes?
_______ What is the probability that a run will take more than 68 minutes?
_______ If I run 50 runs home during 2001, how many runs would be expected to last between 54 minutes and 68 minutes?
Use µ = 61 and
= 7 to convert x = 51 minutes to a z value.
Statistic or Parameter
Calculate a z value from an x
Calculate an x value from a z
z + µ
Calculate a z-statistic from an