uestion 1 (14 points total): )u are a forensic linguist and have been assigned to a. criminal case. A woman has been found dead and had parently committed suicide. However, the police have their suspicions. There were various things about e case that make them think that the woman had actually been murdered by her husband and that the sband had tried to cover his tracks. One piece of evidence is a suicide note in the form of a text message at was sent from the wife's phone to her husband. Police suspect that the husband had actually sent that assage in an attempt to stage the murder as a suicide. wt of your job is to analyse this text message for clues. You quickly notice that there is a spelling mistake the text message. The message includes the wordiissapear which is a misspelling ofdisappear. You ickly contact the phone company Apfie, who provide you with the full text message history of the husband .d the wife for the last 10 years. They provide you with a historical document of all the text messages at the husband has ever sent and the same for the wife. You malie a record of all the times the words sappear and its misspelling dissapear were ever used by the husband and wife. You store the data in a 3 called "murder_case_Apfel". )u decide that you must test whether there is an association between the frequency of usage of the spelling disappear (Correct vs. Incorrect; the dependent variable), and the author of the text (Husband vs. Wife; e independent variable). . a) Name the statistical treat that you will use to test the association between the correctness of the spelling and the author of the text message (1 point). . b) Formulate, in words, the null hypothesis and the alternative hypothesis (2 points). .ad in the data to your R console using the following command: ad( "murder_case_ipfe1 . rda") . c) Summarize the data as necessary (2 points). - d) Use an R command to find the total number of text messages sent by the wife (1 point). . e) Visualize the data graphically using a barplot and provide a brief description of what you see (3 points; 1 point for barplot, 1 point for correct axis labels and 1 point for a description). 0 f) Compute the relevant statistical test (2 points). . g) Report the result of the statistical test. How do you think that this evidence might impact the murder case? (3 points). uestion 2 (5 points total): in are a linguist conducting field research on endangered languages of the world. Your research takes you to e Orinoco Basin where you study the Piaroa language, a language with an estimated 11,000 remaining Bakers. You travel to each village in the Orinoco Basin and document the number of speakers of the Piaroa 1guage who are also bilingual. You are curious to know if there is an imbalance in the numbers of Males . Females who are are bilingual. Below are the results of your count: . a) Input the data into R (1 point)
