statistic manager - 2779 Words

6.14 Show that for a sample of n = 39, the smallest and largest Z values are – 1.96 and + 1.96, and the middle (i.e., 20th) Z value is 0.00. 6.19 The data in the file spending represent the per-capita spending, in thousands of dollars, for each state in 2004. Decide whether the data appear to be approximately normally distributed by A. Comparing data characteristics to theoretical properties. B. Constructing a normal probability plot. 7.1. For a population containing N=902 individuals what code number would you assign for (a)The first person on the list? (b) The fortieth person on the list?  © The last person on the list? .7.8.Prenumbered sales invoices are kept in a sales journal.The invoices are numbered from 0001 to 5000. (a)beginning in†¦show more content†¦8.44.In 2005,34% of workers reported that their jobs were more difficult,with more stress,and 37% reported that they worry about retiring comfortably.consider a follow-up study to be conducted in the near future. (a)What sample size is needed to estimate the population proportion of workers who reported that their jobs were more stress,to within +/- 0.02 with 95% confidence? (b)How many workers need to be sampled in order to estimate the population proportion of workers who worried about retiring comfortably to within +/- 0.02 with 95% confidence? (c )compare the results of(a) and (b).Explain why these results differ. (d)If you were to design the follow-up study,would you use one sample and ask the respondents both questions,or would you select two separate samples?Explain the rationale behind your decision. 9.1.For Ho:u=100,H1:u not equal 100,and for a sample of size n,why beta larger if the actual value of u(mean)is 90 than if the actual value of u is 75? 9.2.If you use a 0.05 level of significance in a(two-tail)hypothesis test,what will you decide if Zstat=+2.21? 9.3.If you use a 0.01 level of significance in a(two-tail)hypothesis test,what is your decision rule for rejecting a null hypothesis that the population mean is 500 if you see the Z test? 9.11.The U.S.Food and Drug Administration(FDA) is responsible for approving new drugs.Many consumer groups feel that the approval process is too easy and,therefore,too many drugs are approved thatShow MoreRelatedHow Statistics For Managers ( Bam1447b )1361 Words   |  6 Pages What I learned in Statistics Kevin Green Statistics for Managers (BAM1447B) Timothy Crawford 12-22-14â€Æ' What I learned in Statistics Statistics is a mathematical and scientific process based on the analysis, interpretation, collection, or explanation, and presentation of a data set. 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