Question
MATH399 Applied Managerial Statistics
Week 3 Assignment Contingency Tables for Probability
QuestionUse the completed contingency table to find the probability that an employee prefers the bus given that they are a seasoned employee. Express your answer as a decimal rounded to two decimal places.
QuestionThe following incomplete contingency table shows a random sample of 120 employees and the routes they prefer. Complete the table.

QuestionFill in the following contingency table and find the number of students who both do not read mysteries AND do not read comics.
QuestionFill in the following contingency table and find the number of students who both do not go to the beach AND do not go to the mountains.
StudentsgotothebeachdonotgotothebeachTotalgotothemountains32donotgotothemountains32Total5427
QuestionFill in the following contingency table and find the number of students who both watch comedies AND watch dramas.
StudentswatchcomediesdonotwatchcomediesTotalwatchdramas34donotwatchdramas10Total3967
QuestionComplete the following contingency table and find the number of students who both do not play sports AND do not play an instrument.
Students              Play an instrument          Do not play an instrument           Total
Play sports          19                           47
Do not play sports                                           29
Total                      46
QuestionA group of 150 students in a high school were asked if they prefer texting or calling.
The following table shows approximate numbers.
Male      Female Total
Texting 22           58           80
Calling   8              62           70
Total      30           120         150
According to the table, what is the probability that a randomly chosen student prefers calling, given that they are male? Give your answer as a fraction in simplest form.
QuestionA group of 155 seniors at a local university were asked if they took an economics class and if they had an internship.
The following table shows the results.
Economics Class                No Economics Class         Total
Internship           30           68           98
No Internship    16           41           57
Total      46           109         155
According to the table, what is the probability that a randomly chosen senior does not have an internship given that they took an economics class? Give your answer as a fraction in simplest form.

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