Broward College Sta2023 Study Guide # 2 MULTIPLE CHOICE. Choose the one alternat

Question

Broward College Sta2023 Study Guide # 2 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or an Answer the question. 1) Which of the following cannot be a probability? C) B) 0 2 A) -1 Find the indicated probability. 2) On a multiple choice test, each question has 5 possible answers. If you make a rar first question, what is the probability that you are correct? B) C) 1 A) 5 Answer the question. 3) Find the odds against correctly guessing the answer to a multiple choice question answers. A) 6:5 B) 5:1 C)5:6 Find the indicated complement. 4) Based on meteorological records, the probability that it will snow in a certain tow 0.185. Find the probability that in a given year it will not snow on January 1st in A) 1.185 B) 5.405 C 0.227 Find the indicated probability. 5) A spinner has equal regions numbered 1 through 21. What is the probability tha stop on an even number or a multiple of 3? A) 17 B) C) 6) The table below describes the smoking habits of a group of asthma sufferers Occasional Regular Heavy Nonsmoker smoker smoker smoker Total Men

Explanation / Answer

1) Probabilities values can only be from 0 to 1. They cannot be negative. Therefore a) -1 is the correct answer here.

2) As there are 5 choices and only one of them is correct and we are randomly selecting a choice, probability that we are correct is computed as:

= 1 / Number of choices

= 1/5

Therefore B) 1/5 is the correct answer here.

3) Odds against correctly guessing the answer is computed as:

= Probability of not getting the question correct / Probability of getting it correct

= (4/5)/ (1/5)

= 4 : 1

Therefore 4: 1 is the correct answer here.

4) Probability that it will not snow is computed as:

= 1 - Probability that it will snow

= 1 - 0.185

= 0.815

Therefore 0.815 is the correct answer here.

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