In: Statistics and Probability
use such products select their brand. A marketing director suggests that the company invest in new advertising and labeling to strengthen its green image. The company decides to do so in a test market so that the effectiveness of the marketing campaign may be evaluated. Based on data collected in the test market, the company constructed a 98% confidence interval for the proportion of all consumers who might buy their brand. The resulting interval is 18% to 27.5%. Which statement(s) is(are) true about the new marketing campaign?
I. Noneofthese
II. Thecompanyshouldnotlaunchthenewmarketingcampaign.
III. Thedatadonotprovideconvincingevidencethatthemarketingcampaignincreasesthepercentageofcustomersforthecompany’sproducts.
IV. Thedatadoprovideconvincingevidencethatthemarketingcampaignincreasesthepercentageofcustomersforthecompany’sproducts.
V. Thecompany should launch the newmarketing campaign.
A) I only.
B) IV and V.
C) II and III.
D) IV only.
E) III only.
A)z=- 0.392 B)z=0.392 C)z=2.57 D)z=1.56 E)z=-2.57
III.Thereisnoevidencethatthebusinessdiscriminatedinitshiringpractices.
fromitsautomaticfillingprocess,theamountofcheeseinsertedintotheravioliisnormallydistributed.Tomakesurethattheautomaticfillingprocessisontarget,qualitycontrolinspectorstakeasampleof25ravioli with mean weight of 15.26 grams and standard deviation of 2.56 grams.Themargin of error (ME)toconstructa99%confidenceintervalforthetruemeanamountofcheesefillingis
A)2.064 B)1.432 C)3.745 D)1.276 E)1.797