quiz

In a Bernoulli trial, how many possible outcomes are there?

• 1

• 2

• 3

• infinity

If a fair coin is tossed twice, how many possible outcomes exist?

• 1

• 2

• 3

• 4

In a geometric distribution, what does the random variable represent?

• The number of successes in nnn trials

• The time between Poisson events

• The number of trials until the first success

• The total count of failures

If the average waiting time for a bus is 10 minutes, what is λ\lambdaλ in the exponential distribution?

• 0.1

• 10

• 1

• 100

The shape of a normal distribution is:

• Skewed right

• Skewed left

• Bell-shaped

• Uniform

In a standard normal distribution, the mean is:

• 1

• 0

• 10

• 5

The total area under a normal curve is:

• 0.5

• 1

• 2

• 10

The PDF of a continuous uniform distribution is:

• constant

• exponential function

• Normal curve

• poisson function

In a Poisson distribution, the mean and variance are:

• Always equal

• Always different

• Mean is greater than variance

• Variance is greater than the mean

If a binomial distribution has n=10 and p=0.3, what is the mean?

• 0.3

• 7

• 3

• 10