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Answer

True

False

.

2 points

Question 2

If two events are not mutually exclusive, then P(A or B) = P(A) + P(B)

Answer

True

False

.

2 points

Question 3

Seventy two percent of all observations fall within 1 standard deviation of the mean if the data is normally distributed.

Answer

True

False

.

2 points

Question 4

The equal likelihood criterion assigns a probability of 0.5 to each state of nature, regardless of how many states of nature there are.

Answer

True

False

.

2 points

Question 5

The Hurwicz criterion is a compromise between the maximax and maximin criteria.

Answer

True

False

.

2 points

Question 6

The Hurwicz criterion is a compromise between the minimax and minimin criteria.

Answer

True

False

.

2 points

Question 7

The maximin approach involves choosing the alternative with the highest or lowest payoff.

Answer

True

False

.

2 points

Question 8

The metropolitan airport commission is considering the establishment of limitations on noise pollution around a local airport. At the present time, the noise level per jet takeoff in one neighborhood near the airport is approximately normally distributed with a mean of 100 decibels and a standard deviation of 3 decibels. What is the probability that a randomly selected jet will generate a noise level of more than 105 decibels?

Answer 0.0228

0.0475

0.0485

0.0500

.

2 points

Question 9

The chi-square test is a statistical test to see if an observed data fit a _________.

Answer Normal probability distribution

continuous probability distribution

particular probability distribution

All of the above

.

2 points

Question 10

Assume that it takes a college student an average of 5 minutes to find a parking spot in the main parking lot. Assume also that this time is normally distributed with a standard deviation of 2 minutes. Find the probability that a randomly selected college student will take between 2 and 6 minutes to find a parking spot in the main parking lot.

Answer 0.1950

0.4772

0.4332

0.6247

.

2 points

Question 11

A group of friends are planning a recreational outing and have constructed the following payoff table to help them decide which activity to engage in. Assume that the payoffs represent their level of enjoyment for each activity under the various weather conditions.

Weather

Cold Warm Rainy

S1 S2 S3

Bike: A1 10 8 6

Hike: A2 14 15 2

Fish: A3 7 8 9

What is the conservative decision for this situation?

Answer A1

A2

A3

Any of the above

.

2 points

Question 12

A group of friends are...

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