« previous next »

Author Question: If there is a positive correlation between X and Y then in the regression equation, Y = bX + a, ... (Read 59 times)

segrsyd

  • Hero Member
  • *****
  • Posts: 530
on: Jun 20, 2018
If there is a positive correlation between X and Y then in the regression equation, Y = bX + a, ____.
 
  A) b > 0
  B) b < 0
  C) a > 0
  D) a < 0

Question 2

A sample of n = 25 individuals is selected from a population with  = 80 and a treatment is administered to the sample. What is expected if the treatment has no effect?
 
  A) The sample mean should be very different from 80 and should lead you to reject the null hypothesis.
  B) The sample mean should be very different from 80 and should lead you to fail to reject the null hypothesis.
  C) The sample mean should be close to 80 and should lead you to reject the null hypothesis.
  D) The sample mean should be close 80 and should lead you to fail to reject the null hypothesis.


sokh

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jun 20, 2018
Answer to Question 1

A

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

The human birth process as an example of positive feedback. The human birth process as an example of positive feedback.
Constant velocity versus positive velocity Constant velocity versus positive velocity
How to find two positive angles less than 360° that have a tangent of −2.25 How to find two positive angles less than 360° that have a tangent of −2.25
How to sketch a quadratic equation that is in standard form (Question 2) How to sketch a quadratic equation that is in standard form (Question 2)
Determining the equation of a triangle median Determining the equation of a triangle median
According to the Balmer-Rydberg equation, electromagnetic radiation with wavelength λ = 486.1 ... According to the Balmer-Rydberg equation, electromagnetic radiation with wavelength λ = 486.1 ...
Video: Stages of Mitosis - Prophase, Prometaphase, Metaphase, Anaphase & Telophase

For a complete list of videos, visit our video library