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

Author Question: The SAT scores have an average of 1200 with a standard deviation of 60 . A sample of 36 scores is ... (Read 295 times)

ericka1

  • Hero Member
  • *****
  • Posts: 544
on: Jun 24, 2018
The SAT scores have an average of 1200 with a standard deviation of 60 . A sample of 36 scores is selected.
 a. What is the probability that the sample mean will be larger than 1224?
  b. What is the probability that the sample mean will be less than 1230?
  c. What is the probability that the sample mean will be between 1200 and 1214?
  d. What is the probability that the sample mean will be greater than 1200?

Question 2

All of the following variable selection procedures are heuristics except
 a. forward selection.
 b. backward elimination.
 c. best-subsets regression.
  d. stepwise regression.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

perkiness

  • Sr. Member
  • ****
  • Posts: 348
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 0.0082
b. 0.9986
c. 0.4192
d. 0.5
e. 1.0

Answer to Question 2

c


ericka1

  • Member
  • Posts: 544
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

vickyvicksss

  • Member
  • Posts: 351
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Results from sequential study of two cohorts tested at three ages and at three different points in t Results from sequential study of two cohorts tested at three ages and at three different points in t
Self-Esteem in a Longitudinal Sample Self-Esteem in a Longitudinal Sample
Sample Advance Directive Sample Advance Directive
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay? How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
Average quarterly presidential approval rating, from Eisenhower to Trump Average quarterly presidential approval rating, from Eisenhower to Trump
Sample Size Affects Sampling Error Sample Size Affects Sampling Error
Video: Enzyme-Catalyzed Reactions

For a complete list of videos, visit our video library