07 Jan Economics Class No
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.
StudentsreadmysteriesdonotreadmysteriesTotalreadcomics13donotreadcomics53Total4242
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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