In each of the following examples a to e identify suitable...

Name: in each of the following examples a to e identify suitable sampling method for the data collection and describe the reason a a scientist investigates the public perception on drug abuse by q 86958
Uploaded: 2022-02-28T06:58:48-08:00
Duration: 7 min 55 s
Channel: Krishna G
Description: in each of the following examples a to e identify suitable sampling method for the data collection and describe the reason a a scientist investigates the public perception on drug abuse by q 86958

1. In each of the following examples (a. to e.), identify suitable sampling method for the data collection and describe the reason. (a) A scientist investigates the public perception on drug abuse by questioning all the patrons who enter a departmental store. (2 marks) (b) A governmental department obtains an alphabetical list of 4327 public health workers in Ohio and constructs a pool of survey subjects by selecting every 50th name on the list. (2 marks) (c) In a survey of 7700 adults, interview subjects are selected by using a computer to randomly generate mobile numbers which are then called. (2 marks) (d) An art department administrator has grouped their faculty members into age categories: below 25, 26-30, 31-35, and above 35. She is surveying 20 members of each category. (2 marks) (e) A farmer has 1100 Chiku trees. He randomly selects 50 trees, and then picks all the fruits on those trees and measures the sugar content in each fruit. (2 marks)

Transcript

0:00 Hello everyone.

00:01 In this problem we have to find the sampling methods to describe the type of samplings and our options are first is simple random simple random sampling next is systematic sampling systematic sampling next stratified sampling stratified sampling next convenience sampling convenience sampling and last is cluster sampling now we have to define these terms so for these terms firstly we have to know about simple random simple random sampling in this every member every member and set of members and set of members has an equal chance of being, equal chance of being included in the sample.

01:24 Included in the sample and our next stratified sampling in these trettified sampling the population the population is first split into split into two groups the overall the overall sample overall sample consists of some members for every group.

02:13 For every group the members from each group are from each group are chosen randomly.

02:36 Cluster sampling the population is first split into two groups then the overall sample consists of the overall sample consists of every member every member from some of the groups some of the groups, the groups are selected randomly and the groups are selected randomly.

03:29 Next is systematic random sampling.

03:36 In this members of population are put in some order are put in some order.

03:50 A starting point is a starting point is selected at random and every nth member is selected to be in the sample.

04:20 And last is convenience sampling.

04:25 In the convenient sampling, the researchers choose a sample that is readily available in some non -random way.

04:53 Non -random way.

04:56 Now we have to answer all the questions in the help of these definitions.

05:11 Now in the first question we have an education researcher randomly selects 38 schools from one district and interviews all the teachers.

05:27 At each of the 38 schools.

05:30 So this is our cluster sampling.

05:34 Next is at a college there are 130 freshmen 90 sophomores, 110 juniors and 80 seniors.

05:47 A school administrator selects a random sample of 12 of freshmen random sample of 9 of sophomores, a random sample of 11 of juniors and random sample of eight of seniors.

05:59 She then interviews all the students selected...

Question

Please give Ace some feedback