7.37. Hypothesis test using z
90 - 59% + Irish Outpul For Eacross Ly 40 less were randomly sampled from the last hour's pro- duction. Their weights (in ounces) are listed in the follow- ing table 247 251 254 313 253 248 253 285 256 252 253 252 253 6 254 256 752 251 2353 251 L. What conditions must be satisfied for the test results to 253 253 1248 251 253 256 254 250 254 1255 249 750 254 251 251 755 751 753 252 253 be Valid? Facial structure of CEO. Refer to the Psychological a. While He and 17, in terms of the true mean weight of Srimer (Vol 27 2011) study on using a chief executive the golf fear officer's facial structure to predict a firm's financial perfor- D. Access the data and find I ands mince, Exercise G.20 (p. 141). Recall that the facial width- c. Calculate the les statistic to-height rilo (WHR) for each in a sample of $5 CEOs d. Find the p-value lon the feel. it publicly traded ForDie 500 firms was determined The Locate the rejection region for the lest insinga sample resulted in 1 1,96 and 1 15. An analyst wants L Do the data provide cullicient evidence to conclude that to predict the financial performance of a Fortune 500 firm the process is put operating satisfactorily? wised on the value of the true mean facial WHR of CEOS In the context of this problem, explain why it make The analyst wants to use the value of je # 12 Do you sense to call a the producer's risk and & the consumer's iceummem be use this value? Conduct a ted of hypothesis rak. for a to help you answer the question Specify all the cle ments of the test Ho. 1, test statistic, p-value, a, and your Applying the Concepts- Intermediate conclusion. 7 38 Unethical corporate conduct. Refer to the Behavioral Trading skills of institutional investors. The trading skills Research in Accounting (July 2015) study of unethical of Institutional stock investors were quantified and ana- corporate conduct, Exercise 6.15 (p 340]. Recall that each lyzed in The Journal of Finance (April 2011) The study in a sample of his accounting graduate students was asked focused on round inp" trades Le, trades in which the to perform in unethical uisk (ed, to bribe a customer). same lock was both bought and sold in the same quarter. and each subject's werder to comply with the unethical Consider a random sample of 200 round trip trades made: heynew score was measured |Scores ranged Inn -15 (in- by institutional investors Suppose the sample mean rate tention to resaid the unethical request to 25 fintention to of return to 295% and the sample standard deviation is comply with the unethical request)] Summary statistics on 8.12%% If the true mean rate of return of round up trades the shecures follow $ 20.5 - 184 One researcher, of Is positive then the population of insulin ional investor is the opinion that subject will tend to perform the nethi- considered in have performed successfully. cal lick, believes the population mean intention same a Sicily the null and alternative hypotheses ha deter will execed ?. Do the data support the beliefy Ra mining whether the population of insurminal inves Lon performed succesfully 7.34 Tune required to complete a task. When a person is maked D. Find the rejection region for the test using How much time will you require to complete the tsky Cognitive theory posits that people leg, a liles comed Interpret the value of i in the winds of the problem. lam) will typically undere dimale the time required Would d. A Minitab printout of the analysis is shown below the opposite the ary hold If the questam 's a plussed in Lasite the led stamthe and pevalue in the printout terms of how much work could be completed in a given amount of Lane! This was the wursthint of interest to re e Gis the appropriate einclusion in the winds of the searchers writing in Applied Cognitive Psisfulogy ( Vul 28. 201 1) For one shady conducted by the iraswithers each in a sample of 40 University of Oslo student was asked for many minutes it would take in read a 12 page acpart. lu a second shils, 42 students were sacked his many japes of a lengthy repost they could read in 48 missed ( The students in either study did aim is lually read the import ) Numerical dow ripuse walidis fisned on salutary hadnourish pub 717 Producers and comamer brick. In quality control applica Dished in the article? les leath muddies me punaded in the home of hypothesis testing, the bull and allemanve byputh Estimated 17 - The price is porfuming in an anecdofat bay mannet Numberof Paras Atsoundingts, a ba jesustimes iclented to as the producers 40 red while of is called the proturner's risk (Stevens Cponderay Menagerieat 3014). An injection modder pro dwor plates golf tees The pangs is designed to produce less with a mean weight of 250 smore To investigaly shatlen the aljesus modder in operating failedackeil
