STT 422 EXAM 1Due Monday Apr 08, 11:59 pm, 25% of Final Grade = 80 points� There are total 8 questions.� Each question has subparts.11 Problem 1Consider the data set bank wage.csv. Using R or otherwise answer the following questions:1. (2 points) Plot wages versus LOS and circle the outlier with the highest value of wage. (Dropthis observation for remaining parts.)2. (1 point) Find the least squares regression line for the regression of wages on LOS.3. (4 points) Give the signicance test for the slope of LOS. (Clearly mention the hypothesis test,test statistic, pvalue and conclusion).4. (3 points) Give a 95% prediction interval at LOS=55.2 Problem 2Consider the data set student gpa.csv. Consider a regression model for predicting GPA using IQ,gender and self-concept. Using R or otherwise answer the following questions:1. (4 points) Give the F-statistic for testingH0 : IQ = gender = selfconcept = 0Also provide the degrees of freedom for this F-statistic.2. (4 point) Run correlation tests to check if GPA is correlated to(a) IQ(b) GENDER3 Problem 3Consider the data set biomarkers.csv. Consider a regression model for predicting VO+ using OC,TRAP and VO-. Using R or otherwise answer the following questions:1. (2 points) Give the statistical model for this including all assumptions.2. (2 point) Give the multiple regression regression line to predict VO+ from OC, TRAP andVO-.3. (4 points) Make a table with t-statistics and pvalues for all the explanatory variables. Whichis the least signicant variable among OC, TRAP and VO-.4. (4 points) Consider the full model and the one without the least signicant variable. Give theanova table to compare these two models.24 Problem 4Do people from di�erent cultures experience emotions di�erently? Here is a summary of the data:Are the means same across di�erent cultures?1. (2 points) Should you use a pooled standard deviation? If yes, what is its value?2. (4 points) Construct an ANOVA table for this problem.3. (2 points) State the hypothesis test for this problem.4. (2 points) Provide the p-value for hypothesis test in part 3.5 Problem 5Consider the data set price promotion.csv. Using R or otherwise answer the following questions.1. (2 points) Construct a contrast which can compare the average of promotions 1 and 7 to theaverage of promotions 3 and 5.2. (3 points) Give a 95% condence interval for the contrast in part 1.3. (4 points) Use the Bonferroni or another multiple-comparisons procedure to compare di�erentprice promotion groups.6 Problem 6Consider the data set intervene program.csv. Using R or otherwise answer the following questions.1. (3 points) Plot the means. Do you think there is an interaction between Group and Time.32. (2 points) Give an estimate for the main e�ect of group 1.3. (4 points) Construct the two way anova model for this problem with group and time as thefactors.4. (2 points) Can you accept the hypothesis that there is a main e�ect of time?7 Problem 7Consider the data set plants1.csv. Using R or otherwise answer the following questions.1. (4 points) Find the means for each species-by-water combination. Plot these means versuswater for the four species, connecting the means for each species by lines.2. (2 points) Give the interaction e�ect between species level 1 and water level 6.3. (4 points) Give the two-way analysis of variance with species and water as factors.8 Problem 8A study of 170 franchise rms classied each rm as to whether it was successful or not. Attached isthe data.1. (2 points) What proportion of exclusive territory rms are successful?2. (2 points) Find the log odds for the answer in part 1.)3. (6 points) Let x = 1 for exclusive territories and x = 0 for other territories. Using R orotherwise.(a) (3 points) The tted logistic regression model.(b) (3 points) Odds ratio for exclusive territory versus no exclusive territory.本团队核心人员组成主要包括BAT一线工程师，精通德英语！我们主要业务范围是代做编程大作业、课程设计等等。我们的方向领域：window编程 数值算法 AI人工智能 金融统计 计量分析 大数据 网络编程 WEB编程 通讯编程 游戏编程多媒体linux 外挂编程 程序API图像处理 嵌入式/单片机 数据库编程 控制台 进程与线程 网络安全 汇编语言 硬件编程 软件设计 工程标准规等。其中代写编程、代写程序、代写留学生程序作业语言或工具包括但不限于以下范围:C/C++/C#代写Java代写IT代写Python代写辅导编程作业Matlab代写Haskell代写Processing代写Linux环境搭建Rust代写Data Structure Assginment 数据结构代写MIPS代写Machine Learning 作业 代写Oracle/SQL/PostgreSQL/Pig 数据库代写/代做/辅导Web开发、网站开发、网站作业ASP.NET网站开发Finance Insurace Statistics统计、回归、迭代Prolog代写Computer Computational method代做因为专业，所以值得信赖。如有需要，请加QQ：99515681 或邮箱：99515681@qq.com 微信：codehelp
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