4- Verbal questions a) A doctor\'s office has 5 doctors on duty, each with a dif

Question

4- Verbal questions a) A doctor's office has 5 doctors on duty, each with a diferent specialty. Each sees about 12 patients a day. You want to take a sample of 15 pationts to about their office experience. Show the use of stratified sampling ask b) From question a), you decide it is simpler for you to get the sample of 15 patients by asking every 4th patient as they leave. What type of sampling is this? c) From question a), you decided it would take you less time to just ask the first 15 patients leaving the examination room for your survey. What type of sampling s this? d) You want to conduct a survey of how the population of the town will vote.You hand out surveys to random people in town addressed to you, with stamped envelope, to ask them to fill out and mail to you. Why isn't this a good sample? e) We follow the medical records of 500 smokers to study their heart related health as compared to 500 nonsmokers. Is this an observation or experiment and why? f) To determine whether a new hand cream can reduce colds, 100 people were randomly divided into two groups. One group given simple cold cream, and the other the new hand cream. The effects were then recorded. Is this an observation or an experiment? g) You have 10 patients with the same degree of Lymphoma. You want to test results of chemo given once a week as compared to chemo given once a month. You use a random number table to select the two groups of five patients each. You assign numbers O to 9 to each of the 10 patients.

Explanation / Answer

a) by using stratified random sampling method for this example is

We can able to know the office experience of each and every specialist by collecting the patients experience after consulting their doctors.

b) we are collecting the every 4th patient when they are leaving this sampling method can be referred to as systematic sampling method

c) here we are selecting only the first 15 patients this is doing accoridna to our convenient. So this samllisa method can be known as convenience sampling method.

d) this cannot be a good sample because,

While sending the questionnaire through this method

There will be some disadvantages they are

1) the people may not be there in homes to receive the post

2) some of the people may not be educated to answer

3) some people are not interested to answer

4) some people may not interested to send email and may don't know how to send mail.etc;

With these disavanatges this can't be a good sample.

e) this is an observational study because we are collecting the data from medical records

f) this is an experimental study because we are collecting the effects from the observations by giving creams to the people.

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