This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: 400 patients suffering from chronic back pain were randomly assigned to one of two groups. Over a ... (Read 48 times)

deesands

  • Hero Member
  • *****
  • Posts: 514
on: Jul 25, 2018
400 patients suffering from chronic back pain were randomly assigned to one of two groups. Over a four-month period, the first group received acupuncture treatments and the second group received a placebo.
 
  Patients who received acupuncture treatments improved more than those who received the placebo.
  A) Designed experiment B) Observational study

Question 2

A researcher wants to perform a hypothesis test to determine whether the mean length of marriages in California differs from the mean length of marriages in Texas. Identify the two populations for the proposed hypothesis test.
 
  A) Adults living in California and adults living in Texas
  B) Marriages in California and marriages in Texas
  C) Lengths of California marriages and lengths of Texas marriages
  D) Married men and married women


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Pariscourtney

  • Sr. Member
  • ****
  • Posts: 352
Reply #1 on: Jul 25, 2018
Answer to Question 1

A

Answer to Question 2

B


deesands

  • Member
  • Posts: 514
Reply 2 on: Jul 25, 2018
Gracias!

kilada

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Your heart beats over 36 million times a year.

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?

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.

A plot of trophic diversity across the major groups of organisms shows highest trophic diversity amo A plot of trophic diversity across the major groups of organisms shows highest trophic diversity amo
Functional Groups of Vitamin C Functional Groups of Vitamin C
Maze-dull rats did not make significantly more errors than maze-bright rats when both groups were ... Maze-dull rats did not make significantly more errors than maze-bright rats when both groups were ...
Apply passive touch on the shoulder and hip. Stand in back and place one hand on the shoulder and ... Apply passive touch on the shoulder and hip. Stand in back and place one hand on the shoulder and ...
Apply thumb strokes to the back of the hand (knuckle to wrist). Apply thumb strokes to the back of the hand (knuckle to wrist).
Pregnancy abdomen pain Pregnancy abdomen pain
Video: Photosynthesis and Van Helmont Experiment

For a complete list of videos, visit our video library