Final answer:
The statement from the ad is incorrect as it claims a reduction beyond 100 percent, which is impossible. The correct approach to assess theft likelihood is through statistical analysis like the one used for Harley Davidson motorcycles, where evidence showed Harleys were stolen less proportionally compared to their market share.
Step-by-step explanation:
There is a statistical inaccuracy in the statement from the advertisement. It is mathematically impossible to reduce the odds of an event by more than 100 percent because doing so would imply that the event would occur less than never. A reduction of 100 percent would mean the event has no chance of occurring at all. The phrase 'reduce by 350 percent' is therefore misleading and incorrect.
In contrast, the scenario with Harley Davidson motorcycles demonstrates a proper statistical analysis. The data suggests that while 14 percent of all motorcycles sold were Harleys, only 8 percent of a sample of 1,945 stolen motorcycles were Harleys. Using statistical hypothesis testing at a 5 percent significance level, we can conclude that there is sufficient evidence to indicate that the proportion of Harleys stolen is significantly less than their share of all motorcycles. This type of analysis provides an insight into the relative likelihood of theft for different brands of motorcycles.