Question on statistics:
QUESTION 2 What is the value of the mean squares between? TTTT Paragraph # Arial 3 (12pt) F T i Ha X D D Q E T T. ABC L fx Mashups C HI H H HTML CSS Path: p Words:0 QUESTION 3 Under HO what distribution does the test statistic follow? What is the observed value of the test statistic here?A manufacturer of energy bars is testing 4 of their new flavours: red rage(R) which harvests the power of goji berries; blue bonanza(B) which is packed full of blueberries; green groove(G) which utilizes the super food Kale; and white wonder(W) which is choc full of white chia seeds. Thirty bars of each type are sent to a lab to test for fat content (in g). A statistician was asked to analyse the data using ANOVA methodology, some of which is presented below. Unfortunately she was not able to complete the analysis and you have been asked to answer the questions below, which primarily concern finding the energy bar with the lowest mean fat content. > summary(AnovaModel.1) Df Sum Sq Mean Sq Fvalue Pr(>F) colour 3 78.47 26.155 30.38 1.45e-14 * * * Residuals 116 99.89 0.861 Signif. codes: 0 0.001 0.01 0.05 0.1 "1 > with(energy, numSummary(fat, groups = colour, statistics = c("mean", mean sd data:n B 9.044371 0.9417587 30 G 10.645709 0.7716196 30 R 10.335671 0.8407149 30 W 8.758037 1.1203592 30 Multiple Comparisons of Means: Tukey Contrasts Fit: aov(formula = fat - colour, data = energy) Linear Hypotheses: Estimate Std. Error tvalue Pr(>|t)) G - B =0 1.6013 0.2396 6.684 leveneTest(score - make, data = cars, center = "median") Levene's Test for Homogeneity of Variance (center = "median") Df Fvalue Pr(>F) group 3 1.1662 0.3258 116 Unless otherwise indicated all questions in this test are talking about the ANOVA output above. Define relevant mean parameters and state the appropriate null and alternative hypotheses to be tested here. TTIF Paragraph + Arial 3 (12pt) IE T . X D D Q E ABC fx Mashups T HTML CSS Path: p Words:0 A1) For multiplication please use an asterix (ie *) eg 3 * 4 = 12 2) For division please use a slash (ie /), you might need to use brackets to make it clear eg (4x + 2x) / 3 = 2x 3) For the mean of some data (ie x) write x-bar 4) For the square of a number (ie 32) please use the carrot or hat symbol, sometimes called the circumflex, (ie ^) eg 3^2 = 9. For a longer expression that is all being squared please use brackets eg (x-3)^2 5) For a square root use sqrt() eg sqrt(9) = 3. 6) For hypotheses use HO and HI for the null and alternative hypotheses respectively 7) For any greek letters just spell them out eg mu for u, sigma for o, etc. As we are dealing with ANOVA there are likely to be multiple means and standard deviations, to distinguish them we might usually write something like 1, 2 and u3 or HA, HB and HC etc. In the test you can use underscore (ie _) to show these subscripts, so mu_1 or mu A etc
