Match the name of the sampling method descriptions given Situations

- Pulling 50 names from a hat
- Asking your 20 closest friends
- Separating all students by grade level, and selecting 10 students from each grade
- Call every 15th phone number on every 5th page of the phone book
- Dividing by population by voting precinct, and sampling everyone in the precints selected

Sampling Method:
a. Cluster
b. Convenience
c. Stratified
d. Systematic
e. Simple Random

- Pulling 50 names from a hat. <-> e. Simple Random

- Asking your 20 closest friends <->  b. Convenience

- Separating all students by grade level, and selecting 10 students from each grade <->  c. Stratified

- Call every 15th phone number on every 5th page of the phone book <->  d. Systematic

- Dividing by population by voting precinct, and sampling everyone in the precints selected <->  a. Cluster

Step-by-step explanation:

Samples may be classified as:

Convenient: Sample drawn from a conveniently available pool.

Random: Basically, put all the options into a hat and drawn some of them.

Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.

Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.

Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

In this question:

- Pulling 50 names from a hat

All options in the hat and pick some of them. So Simpel Rando.

- Pulling 50 names from a hat. <-> e. Simple Random

- Asking your 20 closest friends

Closest friends lead to convenience. so

- Asking your 20 closest friends <->  b. Convenience

- Separating all students by grade level, and selecting 10 students from each grade

Divided the population into groups, and choose some from each group. Stratified.

- Separating all students by grade level, and selecting 10 students from each grade <->  c. Stratified

- Call every 15th phone number on every 5th page of the phone book

Every kth person. Systematic.

- Call every 15th phone number on every 5th page of the phone book <->  d. Systematic

- Dividing by population by voting precinct, and sampling everyone in the precints selected

Division into groups, and choosing everyone from each group. Cluster

- Dividing by population by voting precinct, and sampling everyone in the precints selected <->  a. Cluster

12cm

the answer is d

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560