This Question: 1 pt I5ot 15 (3 complete) People were polled on how many books th

Question

This Question: 1 pt I5ot 15 (3 complete) People were polled on how many books they read the previous year Initial survey results indicate that s 156 books Complete parts (a) through (d) below a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 95% cont!dence? This 95% confidence level requires subjects (Round up to the nearest subject) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 95% confidence? This 95% confidence level requires subjects (Round up to the nearest sub ect , (c) What effect does doubling the required accuracy have on the sample size? Doubling the required accuracy doubles the sample size O B. Doubling the required accuracy quadruples the sample size C. Doubling the required accuracy quarters the sample size D. Doubling the required accuracy halves the sample size. (d) How many subjects are needed to ostimate the mean number of books read the previous year wihin ,a books with 99% conedene This 99% confidence level requires subjects (Round up to the nearest smect ) Compare this result to part (a) How does increasing the level of confidence in the estimate affect sample sue? Why is this reasenable? O A. Increasing the level of confidence increases the sample size reqired For a fired margin of error greater contence can be achieved with a layr sample size Caick to select your answerts)

Explanation / Answer

               Sample size = (z2*s2)/d2

B. Doubling the required accuracy quadruples the sample size.

        d).    45

Increasing the level of confidence increase the sample size.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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