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assume that a population is normally distributed with a mean of 100 and a standard deviation of 15 would it be unusual for the mean of a sample of 20
1 the production manager of koulder refrigerators must decide how many refrigerators to produce in each of the next four months to meet demand at the
in an experiment power is a function of 1the number of variables being measured and the beta level 2the effect size internal validity and
you may have the opportunity to buy some electronic components these components may be reliable 1 or unreliable 2 the potential prots are pound10000
the marketing manager of handy foods ltd is concerned with the sales appeal of one of the companys present label for one of its products market
consider a decision faced by a cattle breeder the breeder must decide how many cattle he should sell in the market each year and how many he should
suppose that 4 million is available for investment in three projects the probability distribution of the net present value earned from each
1 has smartphones affected the consumer behavior if so how and how is it going to change in future 2 forecasting of mobile market time series
1 you are interested in investigating if being above or below the median income medloinc impacts act means act94 for schools complete the necessary
a directed graph is simple if each ordered pair of vertices is the head and tail of at most one edge one loop may be present at each vertex for each
suppose the graph g is n-connected regular of degree n and has an even number of vertices prove that g has a one-factorpetersens 2-factor theorem
the null hypothesis - h0 beta1 0 ie there is homoscedasticity errors and no heteroscedasticity existsthe alternative hypothesis - h1 beta1 ne 0 ie
the null hypothesis - h0 there is no heteroscedasticity ie beta1 0the alternative hypothesis - h1 there is heteroscedasticity ie beta1
in the time series plot and scatter graphs there were many outliers that were clearly visible these have been removed to identify if they were
homoscedasticity - reasons for screening datahomoscedasticity is the assumption that the variability in scores for a continuous variable is roughly
linearity - reasons for screening datamany of the technics of standard statistical analysis are based on the assumption that the relationship if any
normality - reasons for screening dataprior to analyzing multivariate normality one should consider univariate normality histogram normal q-qplot
outliers - reasons for screening dataoutliers are due to data entry errors subject is not a member of the population that the sample is trying to
missing data - reasons for screening datain case of any missing data the researcher needs to conduct tests to ascertain that the pattern of these
r-squared is regarded as the coefficient of determination and is used to give the proportion of the fluctuation of the variance of one variable to
the null hypothesis - h0 beta0 0 h0 beta1 0 h0 beta2 0 betai 0the alternative hypothesis - h1 beta0 ne 0 h0 beta1 ne 0 h0 beta2 ne 0 betai ne
a comprehensive regression analysis of the case study london has been carried out to test the 4 assumptions of regression1 variables are normally
a two-step distillation and mixing process is shown in the figure the system operates at steady-state conditions and there are no chemical reactions