Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. a manufacturer of automobile batteries claim that

A manufacturer of automobile batteries claim that at least 80% of the batteries that it produces will...

90.2K

Verified Solution

Question

Statistics

A manufacturer of automobile batteries claim that at least 80%of the batteries
that it produces will last 36 months. A consumers’ advocate groupwants to evaluate this
longevity claim and selects a random sample of 28 batteries totest. The following data indicate
the length of time (in months) that each of these batteries lasted(i.e., performed properly
before failure): 42.3, 39.6, 25.0, 56.2, 37.2, 47.4, 57.5, 39.3,39.2, 47.0, 47.4, 39.7, 57.3, 51.8,
31.6, 45.1, 40.8, 42.4, 38.9, 42.9, 34.1, 49.0, 41.5, 60.1, 34.6,50.4, 30.7, 44.1. Now, we would
like to test, at a significance level of 0.05, if there is asignificant evidence that less than 80%
of the batteries will last at least 36 months? Conduct and concludethe test.

Answer & Explanation Solved by verified expert
4.3 Ratings (885 Votes)
SolutionWe have to use the onesample ztest for the proportionsince np 5 and n1p 5The null and    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Medical Sciences
1.2K views

A trainer suggests the following nutrition for their athlete surrounding their training: In the hour before training:...

Mechanical Engineering
1.2K views

0.025 of moist air at 18°C dry-bulb and 10°c wet-bulb temperatures mixes with 0.005 kg/s of...

Advance Math
1.2K views

Solve the heat equation (in one dimensional case) for c^2=9, the following boundary and initial conditions: u(0,t)=u(2Pie,t)=0 u(x,0)=5sinx...

Biology
1.2K views

The result of a transduced cell signal will resultin [?] response.A a GolgiapparatusfacilitatedB an energy-specifictype...

Biology
1.2K views

What is the name for the mechanism that explains how a muscle fiber contracts the...

Geometry
1.2K views

CFA Circles Parts Area Circumference Central Ang QUESTIONS Item 1 Item 2 Item 3 Item...

Accounting
1.2K views

A job order system is typically used to determine the full costs of a product...

Accounting
1.2K views

PLEASE NOTE: AUSTRALIAN Describe cash accounting and accrual accounting systems and the relevant advantages and...

Accounting
1.2K views

XYZ Company makes and sells a single product. Each finished unit requires four pounds of...

Accounting
1.2K views

Vulcan Flyovers offers scenic overflights of Mount Saint Helens, the volcano in Washington State that...

Accounting
1.2K views

I need to find the ROE, ROA, PM, GPM, Interest Coverage, and Changne in Revenue...

Finance
1.2K views

Dove Help Save & Exit S What would you pay today for a stock that...