Find the indicated percentages. 4) Lunch Break: In a recent survey of 655 workin

Question

Find the indicated percentages.

4) Lunch Break: In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $44.60 with standard deviation $2.81. The weekly amounts are approximately bell-shaped.

a. Estimate the percentage of amounts that are between $36.17 and $53.03.

b. Estimate the percentage of amounts that are between $41.79 and $47.41

c. Between what two values will approximately 95% of the amounts be?

Find the probability.

5) You roll a fair six-sided die. The die shows a one or a four

A) 10/11 B) 1/3 C) 9/10 D) 3/4

6) A spinner has an equal chance of landing on each of its six numbered regions. After spinning, it lands in region two or six.

A) 1/3 B) 12/13 C) 1/6 D) 3/4

7) A jar contains six blue marbles numbered one to six. The jar also contains five red marbles numbered one to five. You randomly pick a marble. It is blue or has a number greater than two.

A) 9/11 B) 5/6 C) 9/13 D) 5/7

Find the missing probability. (Each worth 2 points)

8) P(A)=0.65 P(B)=0.65 P(AandB)=0.52 P(AorB)=?

A) 0.3 B) 0.075 C) 0.4 D) 0.78

9) P(A)=0.65 P(AorB)=0.845 P(AandB)=0.455 P(B)=?

A) 0.25 B) 0.3025 C) 0.65 D) 0.18

Explanation / Answer

Answer to the question as follows:

5) B. P( you get 1 or 4) = you get 1 or 4/ 6 = 2/6 = 1/3

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