Hi, I am in difficulty when I kept trying to do these questions.

Could you give me a help to solve these questions?

Thank you so much.

Q1

A new medication for heart arrhythmia is administered to 6 subjects at different dosage levels. The subjects' resting heart rates (in beats per minute) are then measured 20 minutes later. The results of the study are recorded below. Determine the correlation coefficient for the data. Then, in a brief sentence or two, interpret your result. dosage (mg) heart rate (bpm) 100 90 150 95 250 80 500 60 700 75 1000 50Salmon caught as part of a research study are rst randomly assigned to either research Group A (A), Group B (B). or Group C (0). Once at the research group, the sh is randomly tagged with either a traditional plastic tag (P) or a microchip ID (M). Finally, the sh may be randomly selected for additional study and receive a surgically-implanted radio transmitter (T) or be immediately released back into the wild without further study (R). (a) Assuming each outcome at each of the three stages is equally likely, draw the tree diagram that represents this scenario. (b) Using your tree diagram, determine the probability that a randomly selected salmon from the study receives a microchip ID or the radio transmitter (or both). A software developer accepts applications for a new job opening at their company. In particular, they review the resumes of 75 of the applicants for their proficiency in Python, JavaScript, and SQL. Among those 75 applicants: . 31 reported proficiency in SQL . 21 reported proficiency in Python . 42 reported proficiency in JavaScript . 5 reported proficiency in SQL and Python . 9 reported proficiency in Python and JavaScript . 14 reported proficiency in SQL and JavaScript . 4 were not proficient in any of the three languages Determine the probability that a randomly selected applicant is proficient in exactly one of those three languages