1. A team of World Campus academic advisors is planning a research study to comp

Question

1. A team of World Campus academic advisors is planning a research study to compare men and women in terms of how many times per semester they interact with their advisors. There are approximately 12,242 World Campus students in total. It would take too long to look up the genders and number of interactions for each student. They want to identify a sample of 100 World Campus students to include in their study.

A. Describe how they could use a simple random sampling method to obtain a sample of 100 World Campus students

B. Describe how they could use a convenience sampling method to obtain a sample of 100 World Campus student

C. Which sampling method would you recommend that the researchers use? Explain why.

D. What is the explanatory variable in this study? It is a categorical or quantitative variable?

E. What is the response variable in this study? It is a categorical or quantitative variable?

2. Sally wants to know what proportion of people like Greek yogurt. She has 1,500 friends on Facebook where she posted a poll on her page. Of her 1,500 friends, 121 responded to the poll. Of those, 97 said that they like Greek yogurt and 24 said that they do not like Greek yogurt.

A. Compute the sample proportion. Use the correct symbols in the Word Equation Editor. ( For a review of using the Word Equation Editor see https://onlinecourses.science.psu.edu/stat200_su17/node/361 )

B. Is sampling bias a potential issue in this study? Explain why or why not

C. Is non-response bias a potential issue in this study? Explain why or why not.

D. Is response bias a potential issue in this study? Explain why or why not.

3. Do children need sleep to grow? About 60% of a child’s growth hormone is secreted during sleep, so it is believed that a lack of sleep in children might stunt growth.

A. What is the explanatory variable and what is the response variable in this association?

B. Describe a randomized comparative experiment to test this association.

C. Explain why it is difficult (and unethical) to get objective verification of this possible causal relationship.

4. Open the file PATOWNS.MTW. This contains a list of all of the towns in Pennsylvania and the number of residents.

A. Use Minitab Express to take a random sample of the names of 20 towns. Include a screen shot of your results here.

B. Use Minitab Express to take a second random sample of the names of 20 towns. Include a screen shot of your results here.

C. Use Minitab Express to take a third random sample of the names of 20 towns. Include a screen shot of your results here.

D. Were your results the same in parts A, B, and C? Explain why or why not.

Explanation / Answer

4) answer

Here we are given 12242 total student .

a)In sampling random sampling each sample as equal chance of selection in sample.

So here each student is equal chance being selection in sample.

So in simple random sampling select randomely 100 student from total 12242 students .

b)In convenience sample we select sample they easily available or near sample.

So select 100 sample from near area or easily available.

c)Here use simple random sampling because they give perfect sample. And they represent hole population.

D)Explanatory variable means independent variables..so here student are explanatory variable each student are independent each other.

E)Girl and boys are depend on each other so they are response variable

as per chegg rules only one question has to be answered

thankyou

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