This topic contains a solution. Click here to go to the answer

Author Question: The best way to determine whether a statistically significant difference in two means is of ... (Read 835 times)

wenmo

  • Hero Member
  • *****
  • Posts: 540
The best way to determine whether a statistically significant difference in two means is of practical importance is to
 a. find a 95 confidence interval and notice the magnitude of the difference.
  b. repeat the study with the same sample size and see if the difference is statistically significant again.
  c. see if the p-value is extremely small.
  d. see if the p-value is extremely large.

Question 2

A newspaper article reported that a large study measured the daily habits of a sample of mid-level managers. The response variable of interest was whether or not the person had a serious illness during the five years of the study. The investigators looked at 30 habits such as smoking, exercise, church attendance, and so on, and for each habit they tested the null hypothesis that the proportions with serious illness were the same for those with and without the habit. The newspaper reported, Only one habit was significantly related to the risk of serious illness. The researchers were surprised to find that the managers who drank tea were significantly more likely to have a serious illness than managers who did not drink tea.. The most likely explanation for this finding is that
 a. drinking tea increases the chance of serious illness.
  b. there is a confounding variable that both increases the chances of drinking tea and increases the chances of serious illness.
  c. people who are prone to illness are likely to prefer tea to other beverages.
  d. there were 30 habits examined, so at least one was likely to be significant just by chance, and drinking tea happened to be it.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

pratush dev

  • Sr. Member
  • ****
  • Posts: 321
Answer to Question 1

A

Answer to Question 2

D




wenmo

  • Member
  • Posts: 540
Reply 2 on: Jul 24, 2018
:D TYSM


Viet Thy

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

For a complete list of videos, visit our video library