Final answer:
The 80% CLOSING statistics suggest that most sales happen during the closing phase, although specific stats were not provided. Car salespersons' weekly sales can be analyzed using a box plot, histograms, or frequency polygons. For population studies, confidence intervals are used to estimate true proportions.
Step-by-step explanation:
The 80% CLOSING statistics refer to the claim that a significant portion of sales occur during the closing phase of the sales process. In the context provided, you did not mention specific statistics related to the closing rate. Nonetheless, it is commonly understood in sales that the latter stages of the sales cycle, which include closing, are critical and that most salespeople focus considerable effort on closing the deal to secure a sale. When considering the data provided about car salespersons and their weekly sales, it's apparent that individual performance varies, and such statistics may shed light on how effective salespeople are at closing deals.
To answer exercise questions based on the data provided, such as constructing a box plot or completing a table, you would need to analyze the data on car salespersons' weekly sales. Tools like histograms, frequency polygons, and time series graphs can help visualize and interpret the data. For studies regarding the population proportion concerning consumer decisions or car ownership, confidence intervals are useful for estimating the true proportion within a certain degree of certainty. In the case of the population proportion query, if a researcher found that 75% of a sample own cars, compared to a national average of 80%, they would use statistical methods to determine if this difference is significant or due to random variation.