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

Author Question: Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, ... (Read 75 times)

stephzh

  • Hero Member
  • *****
  • Posts: 556
Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, this means that:
 a. there is very weak correlation.
  b. the slope b1 is = -0.75.
  c. the value of X is always greater than the value of Y.
  d. None of these choices are true.

Question 2

If the standard deviation of x is 18, the covariance of x and y is 120, the coefficient r = 0.90, then the standard deviation of y is 54.87.
  Indicate whether the statement is true or false



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

srodz

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

B

Answer to Question 2

F




stephzh

  • Member
  • Posts: 556
Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)


patma1981

  • Member
  • Posts: 292
Reply 3 on: Yesterday
Wow, this really help

 

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.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

For a complete list of videos, visit our video library