Asked by
devin deleon
on Dec 01, 2024
Verified
A company hopes to improve its engines,setting a goal of no more than 3% of customers using their warranty on defective engine parts.A random survey of 1200 customers found only 20 with complaints.Create a 95% confidence interval for the true level of warranty users among all customers.
A) Based on the data,we are 95% confident the proportion of warranty users is between 0% and 2.4%.Therefore,the company has met its goal.
B) Based on the data,we are 95% confident the proportion of warranty users is between 1% and 3%.Therefore,the company has met its goal.
C) Based on the data,we are 95% confident the proportion of warranty users is between 0.9% and 3.8%.Therefore,the company has not met its goal.
D) Based on the data,we are 95% confident the proportion of warranty users is between 2.0% and 2.4%.Therefore,the company has met its goal.
E) Based on the data,we are 95% confident the proportion of warranty users is between 0.9% and 2.4%.Therefore,the company has met its goal.
Warranty Users
Individuals or entities that utilize the guarantee provided by manufacturers or sellers, ensuring repair or replacement of products within a specified time frame due to defects.
Confidence Interval
A broad range of values, out of sample statistical assessments, deemed likely to contain the value of an undisclosed population parameter.
Defective Engine Parts
Engine components that have manufacturing flaws or have degraded over time, leading to suboptimal performance or failure.
- Absorb the steps and merit of generating confidence intervals for population proportions.
- Appreciate the role of confidence intervals in deducing population parameters from sample data.
Verified Answer
BS
Learning Objectives
- Absorb the steps and merit of generating confidence intervals for population proportions.
- Appreciate the role of confidence intervals in deducing population parameters from sample data.