The average sale price (online) for four-year-old harley davidson touring motorcycles is approx. normally distributed with a mean of $14,000 and a standard deviation of $4,000. molly saved up $15,000 to spend on a motorcycle. what proportion of the available motorcycles of this type can she afford? what is the 30th percentile for the prices of motorcycles of this type? show that a motorcycle priced at $25,000 would be considered an outlier by the 1.5 x iqr rule.

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking