B. Thereissufficientevidenceto Warrant Rejection of Theclaimthatthe Mean Weightis at Least
A cereal companyclaimsthatthe mean weight of the cereal in itspacketsis at least 14 oz. Assumingthat a hypothesis test of theclaim has beenconducted and thattheconclusionistorejectthenullhypothesis, statetheconclusion in nontechnicalterms.
Answer
a. Thereisnotsufficientevidenceto warrant rejection of theclaimthatthe mean weightislessthan 14 oz.
b. Thereissufficientevidenceto warrant rejection of theclaimthatthe mean weightis at least 14 oz.
c. Thereisnotsufficientevidenceto warrant rejection of theclaimthatthe mean weightis at least 14 oz.
d. Thereissufficientevidenceto warrant rejection of theclaimthatthe mean weightislessthan 14 oz.
A researcherclaimsthattheamounts of acetaminophen in a certainbrand of coldtabletshave a standarddeviationdifferentfromthe sigma = 3.3 mg claimedbythemanufacturer. Assumingthat a hypothesis test of theclaim has beenconducted and thattheconclusionisfailuretorejectthenullhypothesis, statetheconclusion in nontechnicalterms
Answer
a. Thereisnotsufficientevidencetosupporttheclaimthatthestandarddeviationisdifferentfrom 3.3 mg.
b. Thereissufficientevidencetosupporttheclaimthatthestandarddeviationisdifferentfrom 3.3 mg.
c. Thereisnotsufficientevidencetosupporttheclaimthatthestandarddeviationisequalto 3.3 mg.
d. Thereissufficientevidencetosupporttheclaimthatthestandarddeviationisequalto 3.3 mg.
Whatistheminimumsamplesizeyoushould use toassurethatyourestimate of willbewithintherequiredmargin of error aroundthepopulation p? Margin of error: 0.04; confidencelevel: 90%; from a prior study, isestimatedby 0.20.
Answer
240
271
11
813
Whatistheminimumsamplesizeyoushould use toassurethatyourestimate of willbewithintherequiredmargin of error aroundthepopulation p? Margin of error: 0.005; confidencelevel: 99%; from a prior study, isestimatedby 0.192.
Answer
37,031
23,839
206
41,146
Assumethatallthetemperaturereadingshave a standard normal distributionwiththe mean reading of 0 degree C and thestandarddeviation of 1.00 degree C. A quality control analystwantsto examine thermometersthatgivereadings in thebottom 4%. Whatisthereadingthatseparatesthebottom 4% fromtheothers?
Answer
-1.89 degree
-1.48 degree
-1.75 degree
-1.63 degree
Findthevalue of the linear correlationcoefficient r.
I needthe data here
Answer
0.754
-0.775
-0.081
0
A laboratorytested 70 chickeneggs and foundthatthe mean amount of cholesterolwas 228 milligramswith s = 12 milligrams. Construct a 95 percentconfidenceintervalforthe true mean cholesterolcontent, µ, of allsucheggs.
Answer
(226, 232)
(224, 231)
(224, 230)
(225, 231)
Use theconfidencelevel and sample data tofindthemargin of error E: Systolicbloodpressuresforwomenaged 18-24: 94% confidence; n = 100, = 113.8 mm Hg, sigma s = 12.8 mm Hg.
Answer
2.4 mm Hg
2.1 mm Hg
10.0 mm Hg
52.5 mm Hg