College

We appreciate your visit to Researchers investigated the possible beneficial effect on heart health of drinking black tea and whether adding milk to the tea reduces any possible benefit Twenty. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

Researchers investigated the possible beneficial effect on heart health of drinking black tea and whether adding milk to the tea reduces any possible benefit. Twenty-four volunteers were randomly assigned to one of three groups. Every day for a month, participants in group 1 drank two cups of hot black tea without milk, participants in group 2 drank two cups of hot black tea with milk, and participants in group 3 drank two cups of hot water but no tea. At the end of the month, the researchers measured the change in each of the participants’ heart health.

Did the researchers conduct an experiment or an observational study?

Answer :

Using statistical concepts, it is found that it is an experimental study.

  • In an observational study, researches observe the differences between separate groups, without intervention.
  • An experimental study is similar to an observation study, with the difference being that there is an intervention.

  • In this problem, three groups are surveyed according to heart health, depending on the amount of milk on the tea.
  • The milk introduced in the tea is an intervention, and thus, it is an experimental study.

A similar problem is given at https://brainly.com/question/14090635

Thanks for taking the time to read Researchers investigated the possible beneficial effect on heart health of drinking black tea and whether adding milk to the tea reduces any possible benefit Twenty. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada

Answer:

(a) It is an experiment.

(b) Group III has been tested to compare the effect of tea

Step-by-step explanation:

24 volunteers are randomly selected to one of the three groups.

Group I drinks two cups of hot black tea without milk

Group II drinks two cups of hot black tea with milk

Group III drinks two cups of hot water but no tea.

At the end of the month, the researchers measured the change in each of the participant's heart health.

The average change of health status of three Groups can be measured and let it be X1', X2' and X3'. We can set up the hypothesis of no difference of heart health i.e H0 : µ1 = µ2 = µ3 against the alternative hypothesis that they are not equal. As the sample size is less than 30, we can use t-statistic.


Under the above logic, (a) it is an experiment.


(b) Group III has been tested to compare the effect of tea or to have comparison between GroupI and Group III.