Suppose you want to determine the best time and day for classes for Harvard university students....

Suppose you want to determine the best time and day for classes for Harvard university students.

-What is the population of interest?

-What are the individuals?

-What variables are you interested in and what type are they?

-What are the data types?

-Consider the pros and cons of each available sampling method

Expert Solution

- Students of Harvard University is the population of interest

- Individuals are students

- Day and Time are the variables of interest. They are interval variables

- They belong to Date data type which are a type of interval variables

- In a statistical study, sampling methods refer to how we select members from the population to be in the study. Multiple sampling methods are available. Some of them are:

Convenience sample: The researcher chooses a sample that is readily available in some non-random way.
- Pros: Easy to use
- Cons: it could be biased
Voluntary response sample: The researcher puts out a request for members of a population to join the sample, and people decide whether or not to be in the sample
- Pros: Easy to use
- Cons: it could be biased because the people who choose to respond might have a similar opinion about the questions
Simple random sample: Every member and set of members has an equal chance of being included in the sample. Technology, random number generators, or some other sort of chance process is needed to get a simple random sample.
- Pros: They are fairly representative
- Cons: Difficult to execute
Stratified random sample: The population is first split into groups. The overall sample consists of some members from every group. The members from each group are chosen randomly.
- Pros: A stratified sample guarantees that members from each group will be represented in the sample
- Cons: Difficult to choose the groups
Systematic random sample: Members of the population are put in some order. A starting point is selected at random, and every n^th member is selected to be in the sample.
- Pros: Easy to execute and fairly representative

orchestra answered 2 years ago

As university students you are faced with a lot of stress in your day to day...

As university students you are faced with a lot of stress in your day to day life. Discuss the coping mechanisms you utilize to help deal with acute, chronic, and anticipatory stress. Are your strategies adaptive and/or maladaptive? Why would people continue to engage in maladaptive coping strategies?

The university wants to examine whether students spend enough time on their remote classes after switching...

The university wants to examine whether students spend enough time on their remote classes after switching to the online teaching. The university staff sends a survey to 50 random students and asks for the study time per week after the spring break. The mean study time per week of the sample is 25.5 hours. It is believed that the population standard deviation is 3.5 hours. The university wants to know whether the students have spent at least 23 hours per...

Suppose you want to determine the aggregate willingness to pay among students at your school or...

Suppose you want to determine the aggregate willingness to pay among students at your school or employees at your employer for increasing recycling at the school or workplace. How might you do this?

A. Suppose you want to study the number of hours of sleep full-time undergraduate students at...

A. Suppose you want to study the number of hours of sleep full-time undergraduate students at Belmont get each evening. To do so, you obtain a list of full-time undergraduate students at Belmont, obtain a simple random sample of ten students, and ask each of them to disclose how many hours of sleep they obtained the most recent Monday. What is the population of interest in this study? What is the sample? Explain why number of hours of sleep in...

A sample of 300 students of undergraduate and 300 students of postgraduate classes of a university...

A sample of 300 students of undergraduate and 300 students of postgraduate classes of a university were asked to give their opinion towards autonomous colleges. 190 of the undergraduate and 210 of the postgraduate students favoured the autonomous status. i) At 5% significance level, would it be said that the opinions of the undergraduate and postgraduate students on autonomous colleges are independent? {The critical value of the requisite test statistic is 3.84} ( ii) What is the implication / interpretation...

In university classes 32 or less, university students have 50 or more When compared with the...

In university classes 32 or less, university students have 50 or more When compared with the classes, it is claimed that they liked more and got higher grades. In order to test this claim, the university administration is responsible for the same lesson, both 32 people small and 50 people large. He gave a teacher to give to a class. Same to students in both classes at the end of the semester final exam has been applied. The average score...

It is estimated that 30% of university students are taking five or more classes this semester...

It is estimated that 30% of university students are taking five or more classes this semester (let us call them full-load students). Among the full-load students, 20% are working part-time. On the other hand, among the non-full-load students, 60% are working part-time. a) When a university student is randomly selected, what is the probability that one is a full-load student and working part-time? [2] Define event A as: university students taking five or more classes (or being full-load students). Define...

Suppose you want to conduct a survey of a sample of registered at the University. Discuss...

Suppose you want to conduct a survey of a sample of registered at the University. Discuss some techniques that would be appropriate to select the sample. Discuss the advantages and disadvantages of each.

We want to investigate the average time per day students spend playing video games. We pick...

We want to investigate the average time per day students spend playing video games. We pick a simple random sample of 900 students and record how long they play video games per day. It turns out that the sample average is 2 hours and the SD of the sample is 1.25 hours. Find the 91% confidence interval for our estimate of the average time per day spent playing video games.

Suppose you are a financial manager of a company and you want to determine the price...

Suppose you are a financial manager of a company and you want to determine the price of the stock. The most recent annual (2019) dividend payment of the company, was $8 per share. You expect that these dividends will grow at a 5% annual rate over the next five years. At the end of the fifth year (i.e. the end of 2024) the dividend growth rate is expected to increase to 6.5% for the foreseeable future. If the firm’s required...

Question