Module 1 lesson 10

Question 1

A binomial distribution has parameters n=10 and p=0.2; which of the following probabilities is larger?

1. p(2 successes)
2. p(5 successes)
3. p(0 successes)
4. p(0 successes)
5. p(7 successes)

Answer 1

p(2 successes)

Question 2

In a sample of 10 mother child pairs, how many different combinations are possible for getting 5 single mothers and 5 married mothers?

1. 252
2. None of these
3. 120
4. 50
5. 3024

Answer 2

252

Question 3

In a sample of 10 mother child pairs, how many different permutations are possible for getting 5 single mothers and 5 married mothers:

1. 50
2. 252
3. 30240
4. 120
5. none

Answer 3

NOT none of these

Question 4

How many parameters are needed to define a binomial probability distribution

1. 3
2. 0
3. 1
4. None of these
5. 2

Answer 4

NOT 3

Question 5

Data from a large national study reports that 10% of pg women deliver prematurely. a local obstetrician is seeing 16 pregnant women in her next clinic session. which of the following is the probability that none will deliver prematurely?

Answer 5

0.185

Question 6

Data from a large national study reports that 10% of pg women deliver prematurely. a local obstetrician is seeing 16 pregnant women in her next clinic session. which of the following is the probability that three or more will deliver prematurely?

Answer 6

0.211

Question 7

Data from a large national study reports that 10% of pg women deliver prematurely. If a true 10% and ob has 146 patients, how many would be expected to deliver prematurely?

Answer 7

15