STATISTICS

ANOVA, ANCOVA, REGRESSION, RSTUDIO

Directions: Answer the following questions inside the picture and choose the correct answer. Explain why it is the correct answer. All the details for the question is indicated in the picture for each number.

1.

In normality test, it is possible to use a significant test comparing the sample distribution to a normal one in order to ascertain whether data show or not a serious deviation from normality. One of these methods used for normality test is Shapiro-Wilk's test. Which of the following is the correct hypotheses for normality test? Ho: Sample distribution is normal. a. H: Sample distribution is non - normal. Ho: Sample distribution is non - normal. b. H: Sample distribution is normal. Ho: Sample has a normal distribution. " H. : Sample has a non - normal distribution. Ho: Sample has a non - normal distribution. d. H: Sample has a normal distribution.In ANCOVA, which of the following R code(s) can be used to test for assumptions? a. lm () b. ggnorm () c. plot (density () ) d. All of the above.Suppose that we want to build a model that predicts the group membership of a hurricane, either tropical (0) or non-tropical (1) based on the latitude of formation of the hurricane. The response variable is the binary variable Type . new (type of hurricane) and the predictor variable is FirstLat (First Latitude). Using R. we build a model by applying the gim( ) function. For the logistic regression model we specify family = "binomial". The data is available at http::/userpage.fu-berlin.de/soga/200/2010_data_sets/hurricanes.xisx . The R code is I set up filename my. filename