Recent questions in Random Sampling

College StatisticsOpen question

Tanja R.2022-12-13

A Finite final consists of 50 multiple choice questions. If each question has 5 choices and 1 right answer, find the probability that a student gets an A (i.e. 45 or better) by purely guessing on each question.

College StatisticsAnswered question

celesteh12 2022-10-13

usiness Weekly conducted a survey of graduates from several top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is $172,000. Assume the standard deviation is $36,000. Suppose you take a simple random sample of 16 graduates. **Round all answers to four decimal places if necessary.**

- What is the standard deviation of distribution of $X$?
- What is the standard deviation of $\overline{X}$?
- For a single randomly selected graduate, find the probability that her salary is between $164,800 and $177,900.
- For a simple random sample of 16 graduates, find the probability that the average salary is between $164,800 and $177,900.
- For part d), is the assumption of normal necessary? No or Yes

College StatisticsAnswered question

Rapsinincke 2022-07-13

A large high school wants to select a group of 20 students in order to see how well the cafeteria is serving the student body. The school randomly selects 5 freshmen, 5 sophomores, 5 juniors and 5 seniors from a list of students.

- Indicate the type of sampling strategy involved.

- This sampling strategy is stratified sampling.

- This sampling strategy is systematic sampling.

- This sampling strategy is convenience sampling.

- This sampling strategy is clustered sampling.

- This sampling strategy is SRS.

- Indicate the type of sampling strategy involved.

- This sampling strategy is stratified sampling.

- This sampling strategy is systematic sampling.

- This sampling strategy is convenience sampling.

- This sampling strategy is clustered sampling.

- This sampling strategy is SRS.

College StatisticsAnswered question

Cristopher Knox 2022-07-07

Random sampling isthe best sampling technique because it guarentees that our sample will be represantive of the population.

True or false?

True or false?

College StatisticsAnswered question

uplakanimkk 2022-07-04

Which of the following statements are true about random sampling:

A. Four tosses of an unblased coin is an example of random sampling from a Binomial random variable with probabillity of sucess =0.5 and a sample size of 4.

B. Random sampling selects every piece of data in the entire population at least once

C. None of other answers are correct.

D. Four tosses of an unblased coin is an example of random sampling from a Binomial random variable with probabillity of sucess =0.5

A. Four tosses of an unblased coin is an example of random sampling from a Binomial random variable with probabillity of sucess =0.5 and a sample size of 4.

B. Random sampling selects every piece of data in the entire population at least once

C. None of other answers are correct.

D. Four tosses of an unblased coin is an example of random sampling from a Binomial random variable with probabillity of sucess =0.5

College StatisticsAnswered question

Janessa Olson 2022-07-03

A statistics teacher has 4 periods of introductory statistics. She wants to get students’ opinions on a new homework policy. To get a sample, the teacher groups the students by their class performance (A students, B students, etc.). Then she randomly selects 3 students from each class performance group to survey. Which sampling method was used?

- cluster sampling

- simple random sampling

- stratified random sampling

- systematic random sampling

- cluster sampling

- simple random sampling

- stratified random sampling

- systematic random sampling

College StatisticsAnswered question

Sonia Gay 2022-06-29

Identify the sampling technique used in the following situations: 1) A student collected arm lengths from her family members. 2) A new computer sales team separated a city by zip codes and then randomly selected 50 homes to question about their new software. 3) Every 5th driver was checked as to their sobriety at a check point by a local police department. 4) a real estate sales person divided an area by sale prices of homes and questioned them as to their interest in listing their house for sale.

College StatisticsAnswered question

Yahir Crane 2022-06-27

The subscribers to a magazine are numbered. Then, a sample of these people is selected using random numbers. What is the sampling method used in this study?

1. Simple random sampling

2. Systematic sampling

3. Cluster sampling

4. Stratified sampling

1. Simple random sampling

2. Systematic sampling

3. Cluster sampling

4. Stratified sampling

College StatisticsAnswered question

Emanuel Keith 2022-06-26

Compare and contrast stratified random sampling with proportionate stratified random sampling.

College StatisticsAnswered question

Earl Washington2022-06-25

A simple random sample of *n* measurements from a population is a subset of the population selected in a manner such that which of the following is/are true? (Select all that apply.)

Every member of the population has an equal chance of being included in the sample.Every sample of size *n* from the population has a proportionally weighted chance of being selected.Every sample of size *n* from the population has an equal chance of being selected.Each subset of the population has an equal chance of being included in the sample.The simplest method of selection is used to create a representative sample.

College StatisticsAnswered question

cazinskup3 2022-06-25

1. Twenty schools in a province are selected for external moderation. This is an example of:

A. Cluster sampling

B. Stratified sampling

C. Random sampling

D. Systematic sampling

A. Cluster sampling

B. Stratified sampling

C. Random sampling

D. Systematic sampling

College StatisticsAnswered question

Kapalci 2022-06-24

Suppose a researcher conducts a study on the relationship between hours of exercise per week and grade point average at a certain university. To be sure to get an equal number of men and women in the sample, the researcher divides the population into men and women and then randomly selects 200 men and 200 women for the study. What sampling technique did the researcher use?

A. Simple Random Sampling

B. Proportional Stratified Random Sampling

C. Stratified Random Sampling

D. Convenience Sampling

A. Simple Random Sampling

B. Proportional Stratified Random Sampling

C. Stratified Random Sampling

D. Convenience Sampling

College StatisticsAnswered question

Adriana Ayers 2022-06-24

Professor Arig randomly assigned 105 male students who had been referred to the Guidance Center, after a violation of university rules. Students were assigned to undergo (1) Counseling, (2) Gabay, a developed intervention in which students go through series of activities and the material used is related to the students own experiences. Based on inferential statistics, the researches concluded that those in the Counseling group had more violations at follow-up than those in the Gabay group. What is the sampling technique used?

- Simple Random Sampling

- Systematic Sampling

- Startified Random Sampling

- Cluster Random Sampling

- None of the above

- Simple Random Sampling

- Systematic Sampling

- Startified Random Sampling

- Cluster Random Sampling

- None of the above

College StatisticsAnswered question

misurrosne 2022-06-23

Determine the type of sampling used to collect data In a medical research studya researcher selects hospital and interviews the patients that day Please select the correct answer below Random sampling Systematic Sampling Stratified Sampling Cluster Sampling

College StatisticsAnswered question

Hector Petersen 2022-06-22

Simple random sampling:

is used when there is a need to emphasize one or more types of population items.

requires both input and output parameters to be set when using a random number generator.

is generally used with replacement sampling.

is a probabilistic sampling method.

is used when there is a need to emphasize one or more types of population items.

requires both input and output parameters to be set when using a random number generator.

is generally used with replacement sampling.

is a probabilistic sampling method.

College StatisticsAnswered question

Averi Mitchell 2022-06-17

State the differences and similarities between simple random sampling procedure and systematic sampling procedure.

College StatisticsAnswered question

Alannah Short 2022-06-15

Identify the type of sampling method used by the researcher in each situation: simple random sampling, systematic sampling, stratified sampling, or cluster sampling.

1. A researcher interviewed all the nurses in each of the 5 randomly selected private hospitals in Northern Mindanao.

2. A statistician selected a sample of ? = 500 high school students from a private school with 2,500 students. He randomly selected the students from each grade level.

3. A Statistics student did a research on the time spent by Grade 11 and 12 students in playing mobile legends. He randomly selected his subjects by using the Table of Random Numbers.

4. A teacher conducted a study in her school to determine who were better in mathematics: the males or the females.

1. A researcher interviewed all the nurses in each of the 5 randomly selected private hospitals in Northern Mindanao.

2. A statistician selected a sample of ? = 500 high school students from a private school with 2,500 students. He randomly selected the students from each grade level.

3. A Statistics student did a research on the time spent by Grade 11 and 12 students in playing mobile legends. He randomly selected his subjects by using the Table of Random Numbers.

4. A teacher conducted a study in her school to determine who were better in mathematics: the males or the females.

College StatisticsAnswered question

Extrakt04 2022-06-15

Identify the sampling scheme applied in each of the given situations. Write the complete name of sampling procedure. Explain your answer in at most 5 sentences.

1. One hundred children chosen at random by lottery method from the list of pupils enrolled in the barangay Day Care Center will form a sample for the study of occurrence of malnutrition among pre-school children in a certain barangay.

2. Students are grouped according to year level. Ten representative from each year level were chosen at random using lottery method to answer a survey on the use of Blended Learning Approach.

1. One hundred children chosen at random by lottery method from the list of pupils enrolled in the barangay Day Care Center will form a sample for the study of occurrence of malnutrition among pre-school children in a certain barangay.

2. Students are grouped according to year level. Ten representative from each year level were chosen at random using lottery method to answer a survey on the use of Blended Learning Approach.

College StatisticsAnswered question

doodverft05 2022-06-14

Determine the following situations then, what type of random or non random sampling technique is used. 1. Selected vehicle are classified according to the last number of their plates as odd or even. 2. There are 30 freshmen, 20 sophomores, 10 juniors, and 5 seniors enrolled in a certain course. Samples are to be taken from them according to the total number of students per year level. 3. Minority groups of senators are to be interviewed 4. Every five files out 500 files will be chosen 5. Animals going to astray are to be observed. 6. Two thousand respondents nationwide, from regions down to barangays, are selected for a national election. 7. Five hundred "like" in Facebook are used as basis for making a decision 8. Selected respondents for a study are those with acquired immune deficiency syndrome (AIDS). 9. Ten names of students were picked out from a box containing 1,000 names written in rolled papers 10. Respondents are chosen from a list

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Starting with a simple random sampling example, you will learn that this approach to statistics is used in Sociology, Healthcare, Engineering, Finances, and all the possible business aspects where some calculations are used. You can take a look at the random sampling problems with solutions by connecting questions and the answers based on what you have to provide. Remember to calculate things first by using equations and the relevant formulas to have the statistical sample. At the same time, do not forget about the randomness of the values and variables that you have to provide random sampling for your task.