1.
When conducting a survey, it is important to use a random sample:
2.
In order to obtain a sample of undergraduate students in the United States, a simple random sample of 10 states is selected. From each of the selected states, 10 colleges or universities are chosen at random. Finally, from each of these 100 colleges or universities, a simple random sample of 20 undergraduate students is selected. Thus, the final sample consists of 2,000 undergraduates.
This is an example of:
3.
The faculty senate at a large university wanted to know what proportion of the students thought foreign language classes should be required for everyone. The statistics department offered to cooperate in conducting a survey, and a simple random sample of 500 students was selected from all the students enrolled in statistics classes. A survey form was sent by email to these 500 students.
4.
Ross Times, the student newspaper of Ross College, printed a "What do you think?" column feature asking: "Do you think that the college is doing enough to provide student parking?" Anyone could mail in a response or use the paper's Web site to respond. In all, 126 answers were received.
This is an example of:
5.
Which of the following is an example of stratified sampling?
1. Answer is
To avid bias and to get a representative sample.
Note : In random sampling every unit in the entire target population has an equal chance of being selected. Therefore in random sampling bias of selection can be avoided and the sample becomes a true representative of the population.
2. Answer is multistage sampling
Note : In multistage sampling several levels of cluster selection is done before final sample is selected.
3. Population of interest is : All the students at the university
The sampling frame is : all the students who enrolled in statistics class.
True about the study : Even though the sampling is random ,it is not representative of the population of interest.
Note ; We can see that the population of interest is all students at the university , but sampling is done from students enrolled in statistics ,therefore though random sampling is done , it is not representative of the entire population.
4. Answer is : A voluntary response sample.
5. Stratified sampling : A health educator wanted to study the sleeping habits of the undergraduate students in her university . for her study , the researcher chose a simpl random sample of size 150 from each classes........
Note : In stratified sample , the population is divided into strata and sample from each stratum is collected .
1. When conducting a survey, it is important to use a random sample: to get a...
The faculty senate at a large university wanted to know what proportion of the students thought foreign language classes should be required for everyone. The statistics department offered to cooperate in conducting a survey, and a simple random sample of 500 students was selected from all the students enrolled in statistics classes. A survey form was sent by email to these 500 students. In this case, the sampling frame is: 1. all the student at the university. 2. all the...
The faculty senate at a large university wanted to know what proportion of the employees thought the food services at the university are satisfactory. The statistics department offered to cooperate in conducting a survey, and a simple random sample of 100 faculty members was selected. A survey form was sent by email to these 100 employees. In this case, the population of interest is: all the employees who are faculty members. all the employees at the university. all the employees...
1. A study is conducted among first year undergraduate students in a US College of Nursing. From a list of these students, every 10th student is selected for an interview. Which of the following sampling strategies is being used? a) Simple random sampling b) Systematic sampling c) Stratified random sampling d) Cluster sampling 2. A study is conducted among first year nursing students in a US College of Nursing. Students are first grouped according to the state in which they...
(1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. B. a sample of size n chosen in such a way that every set of n units in the population has an equal chance to be the sample actually selected. C. a sample of size...
1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has a known nonzero chance of being selected. B. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. C. a sample of size n chosen in such a...
1. In order to investigate whether female students are more likely to own an laptop computer than male students, a researcher selects a random sample of 4 undergraduates from each of the 164 majors at Utah State. She asks each student if they own a laptop or not and records the student's sex. A. Is this study an experiment or observational study? a. Observational study b. Experiment B. What are the individuals? a. Male students b. Female students c. Undergraduate...
1. On a national standardized test Jimmy gets results that say he scored in the 95th percentile. This means (a) Jimmy got 95% of the questions correct on the test. (b) Jimmy's score was two standard deviations above the mean. (c) Of the students that took the exam, 95% scored the same or lower than Jimmy. (d) Of the students that took the exam, 5% scored the same or lower than Jimmy. 2. A high school offers three foreign language...
All students who take a statistics course at Brockport are selected to be subjects of a research study. They are asked to fill out a survey including demographic information which is then used to describe the “typical Brockport college student.” What kind of sampling is this? A) convenience sampling B) simple random sampling C) stratified sampling D) cluster sampling
3. At CSUF, a simple random sample of 100 entering graduate students in 2018 found that 20 of the sampled students in the bottom third of their undergraduate class. Admission standards were tightened in 2019. In 2019, a simple random sample of 100 entering graduate students found that only 10 finished bottom third of their undergraduate class. Let P, and p, be the proportions of all entering graduate students in 2018 and 2019, respectively, who graduated in the bottom third...
Question 1: A study is to be conducted to examine how much currently-enrolled students at a particular university feel their academic program is relevant to their livelihood goals. Each student sampled is asked to provide a score on a scale from 0-10, with 1 signifying that their program is of minimal relevance, and 10 signifying that their program is of maximal relevance. a) Describe the relevant population for this study. For each of (b)-(f), which are different approaches to collecting...