An online poll asked people what their main source of news was: newspapers,television,internet,or radio.Here are the results: \[\begin{array} { l | l } \text { Response } & \text { Number } \\ \hline \text { Newspapers } & 241 \\ \text { Television } & 398 \\ \text { Internet } & 105 \\ \text { Radio } & 164 \\ \hline \text { Total } & 908 \end{array}\] If we select a person at random from this sample of 908 people,what is the probability that the person responded "Internet" or "Radio"?

A) 0.116 B) 0.704 C) 0.296 D) 0.181 E) 269 A) 0.116 B) 0.704 C) 0.296 D) 0.181 E) 269

The table shows the political affiliation of voters in one city and their positions on raising taxes. Raising Taxes \[\begin{array} { l | c | c } & \text { Favor } & \text { Oppose } \\ \hline \text { NDP } & 0.09 & 0.27 \\ \text { Conservative } & 0.23 & 0.17 \\ \text { Other } & 0.15 & 0.09 \end{array}\] What is the probability that a randomly picked person votes Conservative and opposes raising taxes?

A) 0.321 B) 0.400 C) 0.530 D) 0.425 E) 0.170 A) 0.321 B) 0.400 C) 0.530 D) 0.425 E) 0.170

The contingency table below provides a joint frequency distribution for a random sample of patients at a hospital classified by blood type and sex. Blood Type \[\begin{array} { | l | c | c | c | c | c | } \hline \text { Sex } & \text { O } & \text { A } & \text { B } & \text { AB } & \text { Total } \\ \hline \text { F } & 105 & 85 & 24 & 11 & 225 \\ \hline M & 72 & 74 & 15 & 4 & 165 \\ \hline \text { Total } & 177 & 159 & 39 & 15 & 390 \\ \hline \end{array}\] If a person is selected at random from the sample,find the probability that the person has blood type A or is female.

A) 0.985 B) 0.767 C) 0.378 D) 0.535 E) 0.218 A) 0.985 B) 0.767 C) 0.378 D) 0.535 E) 0.218

Exam 12: From Randomness to Probability

An online poll asked people what their main source of news was: newspapers,television,internet,or radio.Here are the results: Response Number Newspapers 241 Television 398 Internet 105 Radio 164 Total 908 If we select a person at random from this sample of 908 people,what is the probability that the person responded "Internet" or "Radio"?

(Multiple Choice)

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Question 61

The table shows the political affiliation of voters in one city and their positions on raising taxes. Raising Taxes Favor Oppose NDP 0.09 0.27 Conservative 0.23 0.17 Other 0.15 0.09 What is the probability that a randomly picked person votes Conservative and opposes raising taxes?

(Multiple Choice)

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(30)

Question 62

The plastic arrow on a spinner for a child's game stops rotating to point at one of four colours that will determine what happens next.Determine whether the following probability assignment is legitimate. Probability of ... Red Yellow Green Blue 0.40 0.10 -0.90 1.40

(Multiple Choice)

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Question 63

The probability that a student at a certain college is male is 0.47.The probability that a student at that college has a job off campus is 0.22.The probability that a student at the college is male and has a job off campus is 0.12.If a student is chosen at random from the college,what is the probability that the student is male or has an off campus job?

(Multiple Choice)

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Question 64

A random spinner can land on red,green,blue,or yellow.If on the first three spins it lands once each on red,green,and yellow,is it more likely to land on blue on the fourth spin?

(Multiple Choice)

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Question 65

A telemarketer is almost through with her entire shift,and she has not made a single sale.Her manager says that she has a good chance of making a sale on her last few phone calls because she is due.Is her manager right?

(Multiple Choice)

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Question 66

In a business class,40% of the students have never taken a statistics class,15% have taken only one semester of statistics,and the rest have taken two or more semesters of statistics.The professor randomly assigns students to groups of three to work on a project for the course.What is the probability that the first group mate you meet has studied two or more semesters of statistics?

(Multiple Choice)

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Question 67

The contingency table below provides a joint frequency distribution for a random sample of patients at a hospital classified by blood type and sex. Blood Type Sex O A B AB Total F 105 85 24 11 225 M 72 74 15 4 165 Total 177 159 39 15 390 If a person is selected at random from the sample,find the probability that the person has blood type A or is female.

(Multiple Choice)

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Question 68

In a survey of women who were asked to name their favorite colour,15% said blue,15% said red,18% said green,14% said yellow,and 12% said black.If you pick a survey participant at random,what is the probability that her favorite colour is not red?

(Multiple Choice)

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Question 69

The table shows the political affiliation of voters in one city and their positions on raising taxes. Raising Taxes Favor Oppose NDP 0.09 0.27 Conservative 0.23 0.17 Other 0.15 0.09 What is the probability that a randomly picked person votes Conservative and opposes raising taxes?

The plastic arrow on a spinner for a child's game stops rotating to point at one of four colours that will determine what happens next.Determine whether the following probability assignment is legitimate. Probability of ... Red Yellow Green Blue 0.40 0.10 -0.90 1.40

A random spinner can land on red,green,blue,or yellow.If on the first three spins it lands once each on red,green,and yellow,is it more likely to land on blue on the fourth spin?

A telemarketer is almost through with her entire shift,and she has not made a single sale.Her manager says that she has a good chance of making a sale on her last few phone calls because she is due.Is her manager right?

In a survey of women who were asked to name their favorite colour,15% said blue,15% said red,18% said green,14% said yellow,and 12% said black.If you pick a survey participant at random,what is the probability that her favorite colour is not red?

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