- 2 A Load The Carsmall Data Set Which Is One Of Matlab S Example Data Files Load Carsmall Check The Workspace Window 1 (160.88 KiB) Viewed 25 times
2. (a) Load the carsmall data set, which is one of MATLAB's example data files. load carsmall Check the Workspace window to find out the names, dimensions, minimum and max- imum values of the variables within this data set. Which variables have some missing values (NaN)? Which variables have character rather than numeric values? (b) Find out the sample sizes corresponding to country of origin (Origin). As some of the sample sizes are too small in order to draw meaningful statistical conclusions, merge the three countries with the smallest sample sizes into a new category called 'Other'. tabulate (Origin) newOrigin = mergelevels (nominal (Origin), {'France', 'Italy', 'Sweden'}, 'Other'); Then conduct a one-way Analysis of Variance to compare mean miles per gallon (MPG) between the groups specified within newOrigin. State your hypotheses and conclu- sions, using significance level 0.05. * (c) What is an estimate of the common population standard deviation? (d) Apply a Bonferroni multiple comparisons procedure to the data in (b), using overall significance level 0.05. State your conclusions.