Question 13 (1 point) It is calculated that, in order to estimate the true mean

Question

Question 13 (1 point) It is calculated that, in order to estimate the true mean weight of a certain breed of cats to within 5 pounds with 95% confidence, we would need a sample of 200 cats. Weights of this breed of cats are known to follow a normal distribution. How many cats would we need to sample in order to estimate the true mean weight to within 3 pounds with 95% confidence? As you should always do with sample size determination questions, always round up your decimal answer to the next higher whole number. Your Answer: Answer

Explanation / Answer

old margin of error E1 =5

here margin of error E2 =3

as required sample size is inversely proportion to square of margin of error

therefore required sample size =n1*(E1/E2)2 =200*(5/3)2 =~ 556

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

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