An Experiment Was Performed to Determine Which Brand of Comparably

question 27

Essay

An experiment was performed to determine which brand of comparably priced light bulbs, A or B, lasts longer on average. Ten bulbs of each brand were tested, and their lifetimes recorded in hours. The data are shown below:
Bulb A: 88, 97, 110, 122, 128, 129, 135, 141, 150, 165
Bulb B: 23, 55, 93, 106, 111, 115, 123, 128, 153, 171
​
(a)Display these data using a comparative (back-to-back) stemplot.
(b)What are the differences and similarities in the lifetime distributions for the two samples?
(c)If your preference for brand A or B must be determined from the information in parts (a) and (b), which brand would you buy? Explain your choice using appropriate statistical terminology.

---

Definitions:

Processing Department

A specific area or segment of a manufacturing facility where a distinct process or series of activities is carried out.

Ending Inventory

At the conclusion of a financial cycle, the cost of products up for sale is figured out by taking the starting inventory, adding any acquisitions, and deducting the expense associated with the goods that have been sold.

Weighted-Average Method

An inventory costing method that calculates the cost of ending inventory and the cost of goods sold based on the average cost of all goods available for sale during the period.

Conversion Costs

The combination of direct labor costs and manufacturing overhead costs, representing the costs to convert raw materials into finished products.