Health

Tech

Gen Studies

Total

Male

137

686

724

1547

Female

412

172

885

1469

Total

549

858

1609

3016

The above table shows a sample of students by major.Round answers for 12-17 to one decimal place.

1.What is the probability that a student chosen at random is majoring in health?

2.What is the probability that a student chosen at random is Male?

3.What is the probability that a student chosen at random is majoring in Tech and is male?

4.What is the probability that a student chosen at random is majoring in Tech or is male?

5.If a student chosen at random is Male, what is the probability that they are majoring in Tech?

6.If a student chosen at random is majoring in tech, what is the probability that they are Male?

Use the following situation to answer questions 18-24. About 5% of the population has an allergy to dogs (actually it is much smaller than that!) and test for the allergy is 90% accurate.

7.Fill in the table by using a sample population of 10,000 people, then answer the questions below (see your notes to remember how to do this). (Round to the nearest whole number)

Test Shows Positive

Test shows Negative

Total

Allergic to dogs

Not Allergic to dogs

Total

8.If you have a dog allergy, what is the probability you will test positive? Rounded to 1 decimal place.

9.If you tested positive, what is the probability you have a dog allergy? Rounded to 1 decimal place.

10.If you tested negative, what is the probability you have a dog allergy? Rounded to 2 decimal place.

11.What is this test result called?____________________

12.If you tested positive, what is the probability you do not have a dog allergy? Rounded to 1 decimal place.

13.What is this test result called?____________________