athx.ccmi BUSN 5760 oc SU 2017 Applied Business Statistics Quiz: Week 3 Quiz CH

Question

athx.ccmi BUSN 5760 oc SU 2017 Applied Business Statistics Quiz: Week 3 Quiz CH 7 & 8 This Question: 1 pt 0 of 10 (A complete) What adver medi a brand he mosl credibilily in uencing brand decisions? Aucordr lo survey, 43 of Milor als poirillo TV. Colriplele parles (a) ough lo conduct atollow-up study that would provide 9 contdence that the point estim ate S rnrrert to with in t006 ot the population proporto n, how large a sample sce is requred. A sample size ot people is requred Round up to the nearest integer.) b. To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within E0. 06 of the population proportion, how rnany people need to be sampled? A sample size of people is needed. (Round up lo he nodies integer) e. lo conduct a follow-up study that would provide 9:'h contdence that the point estimate is correct to within 2002 otthe population proportion, how large a sample sce s requred" A sample size ot people is requred (Round up to thc ncarcst inlogcr) d. To conduct a tallow-up study that would Prown togub contdence that the point estimate s correct to in 0.02 otthe population proportion, how many people need to be sampled? de A sarnple size of people is needed. (Round up to thc ncarcst inlogcr) e. Discuss the effects changng the desired conhdence level and the acceptable sampang error on sample sce requirements. Select all that apply A. he higher the level at dence desred, the smaller is the sample sce required. B. The ytrvaller level Urournukynue ukusired, lhe larg20r is santyk sice required C. The higher the sampling error desired, the larger is the sample size required. D. he smaller the sampling error desred, the largersthe sample size req E. The higher Ule level of oorlliderlue desired, Ule larger is lhe sarnyle size required. F. The smaller the sampling crror desired, the smaller is the sampk szc rcquired. G. There are no effects on the sample size requirements. Click to sclcct your answcr Dwayne Middleton & 18/17 10:38 PM Time Remaining: 01.20.49 Submil Quiz This Quiz: 13 pts possible

Explanation / Answer

P = 0.43

1 – p = 1 – 0.43 = 0.57

For 95% we get the critical z from normal table as 1.96

For 99% we get the critical z from normal table as 2.576

Question a)

n = (zc/E)^2*p*(1-p)

    = (1.96/0.06)^2*0.43*0.57

    = 261.55

   ~ 262

Answer: 262

Question b)

n = (zc/E)^2*p*(1-p)

    = (2.576/0.06)^2*0.43*0.57

    = 451.79

   ~ 452

Answer: 452

Question c)

n = (zc/E)^2*p*(1-p)

    = (1.96/0.02)^2*0.43*0.57

    = 2353.94

   ~ 2354

Answer: 2354

Question d)

n = (zc/E)^2*p*(1-p)

    = (2.576/0.02)^2*0.43*0.57

    = 4066.07

   ~ 4066

Answer: 4066

Question e)

Answer:

Option D) The smaller the sampling error desired the larger the sample size required.

Option E) The higher the level of confidence desired the larger the sample size required.

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