The breaking strengths of cables produced by a certain manufacturer have a stand

Question

The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 105 pounds. A random sample of 70 newly manufactured cables has a mean breaking strength of 1750 pounds. Based on this sample, find a 95% confidence interval for the true mean breaking strength of all cables produced by this manufacturer. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place (if necessary.consult a list of formulas) What is the lower limit of the 95% confidence interval? what is the upper limit of the 95% confidence interval? Clear Undo Help ee Prev. Question Next Question > https:/ kscgi/x/lsl.exe/1o.u-lgNslkri8p3)H-v-6tx HKosQ1WWC1L8NcmgZwdkft O Type here to search

Explanation / Answer

(Xbar - z* sigma/sqrt(n)), (Xbar + z* sigma/sqrt(n))
(1750 - 1.96*105/sqrt(70) ,1750 + 1.96*105/sqrt(70)
(1725.40219522 , 1774.59780478)

=(1725.4022 , 1774.5978)

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.