Determination of Probability

Salmi expected to receive 4 emails in a week. Find the probability of receiving 8 emails for the next 2 weeks.

• 0.0511

• 0.0297

• 0.5470

• 0.1395

Choose the correct sign

'probability from 4 to 9'

• P(4<X<9)

• P(4<X≤9)

• P(4≤X≤9)

• P(4≤X<9)

Find P (-1.26 < z < 3.25). 

• 0.0047

• 0.9204

• 0.8956

• 0.4981

Find the mean of a binomial distribution with n=50 and p=0.4

• 50

• 4

• 20

• 10

What is the probability of making a Type I error?

• alpha

• 1 minus the probability of a Type II error

• 1 minus the power

• the p-value

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of NOT pulling a red?

• 3/10

• 3/9

• 2/3

• 1/3

If you were to roll the die one time what is the probability of it landing on a 2?

• 2 out of 6

• 2 out of 2

• 1 out of 6

• 1 out of 1

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6

• 1/2

• 1/3

• 1/6

Find the experimental probability:

Roll dice: 1, 3, 3, 4, 4,1,5

P(1) =

• 3/7

• 1/6

• 2/7

• 1/5

A coin is tossed three times at random. What is the probability of getting at least one head?

• 5/8

• 7/8

• 3/4

• 1