Q 104. Frozen batteries Will storing ba... [FREE SOLUTION]

91影视

The Practice of Statistics for AP

David Moore,Daren Starnes,Dan Yates

$Math Studyset 91影视 Explanations$ Math

4th Edition 路 809 pages

ISBN: 9781319113339

Chapter 4: Q 104. (page 269)

Frozen batteries Will storing batteries in a freezer make them last longer? To find out, a company that produces batteries takes a random sample of $100 A A$ batteries from its warehouse. The company statistician randomly assigns $50$ batteries to be stored in the freezer and the other $50$ to be stored at room temperature for $3$ years. At the end of that time period, each battery鈥檚 charge is tested. Result: Batteries stored in the freezer had a higher average charge, and the difference between the groups was statistically significant. What conclusion can we draw from this study? Explain.

Short Answer

Expert verified

This research suggests that storing these batteries in cooler temperatures helps them retain their charge for longer.

Step by step solution

Given information

Number of batteries, $n = 100$

According to the findings, batteries kept in the freezer had a greater average charge, and the difference between the two groups was statistically significant.

Concept

Human studies must be approved by an institutional review board in advance. Before taking part, all participants must express their informed consent. Any information regarding the study participants must be kept private.

Explanation

The researchers want to discover if chilling batteries increases their lifespan. To investigate this, an experimental investigation was done. As a result of this research, we can conclude that storing these batteries in colder circumstances helps them retain their charge for longer. This may or may not apply to other battery types, such as dry cells vs. lithium-ion batteries, $A A$ vs. $A A A$ batteries, or batteries that are not in use.