cristina cognat 12/1/17 10:43 PM Homework: Lesson 6, Section 6.1 Homework Save M

Question

cristina cognat 12/1/17 10:43 PM Homework: Lesson 6, Section 6.1 Homework Save MyStatl score: 0 of 1 pt O My 6.1.51 80, 8 (1 complete) Hw Score: 5%, 0.4 of 8 pts Question Help A machine cuts plastic into sheets that are 35 feet (420 inches) long. Assume that the population of lengths is normally distributed. Compilete parts (a) and (o) Home Quizze Study (a) The company wants to estimate the mean length the machine is cutting the plassic within 0.25 inch. Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 0.50 id. (Round up to the nearest whole number as needed.) StatCn Chapt Tools Enter your answer in the answer box and then click Check Answer Check Answer Clear All Discu2 parts ning Cou 9 6

Explanation / Answer

solution=

A)
Sample size

(n) = (z* sd / error)^2 = ( (1.645) (0.50) /0.25)^2 =10.82
= 11

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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