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

Author Question: Assuming a normal distribution, where would you find approximately two thirds of the scores if they ... (Read 86 times)

Deast7027

  • Hero Member
  • *****
  • Posts: 538
on: Jul 8, 2018
Assuming a normal distribution, where would you find approximately two thirds of the scores if they ranged from 30 to 68, M = 45, and SD = 7? Between:
 
  a. 30 and 68
  b. 31 and 59
  c. 37 and 61
  d. 38 and 52

Question 2

What percent of scores will be within one standard deviation above or below the mean?
 
  a. 34
  b. 68
  c. 95
  d. 99


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

elizabethrperez

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 8, 2018
Answer to Question 1

ANS: D
In the normal curve, 68 of scores will be within one standard deviation above or below the mean. In the example, two thirds of scores (66) fall between 30 and 68. The mean = 45 and the SD = 7 for this sample. It follows that scores will fall between one standard deviation below (45  7 = 38) and one standard deviation above the mean (45 + 7 = 52).

Answer to Question 2

ANS: B
In the normal curve, 68 of the scores will be within one standard deviation above or below the mean.


Deast7027

  • Member
  • Posts: 538
Reply 2 on: Jul 8, 2018
Excellent

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

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?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Refraction; A, normal eye; B, myopia; C, hyperopia. Refraction; A, normal eye; B, myopia; C, hyperopia.
The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion. The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion.
A) Normal bronchiole and (B) bronchiole constricted in asthma attack. A) Normal bronchiole and (B) bronchiole constricted in asthma attack.
How to find the area of composite figures (Part 2) How to find the area of composite figures (Part 2)
How to use a tree diagram to find the probability How to use a tree diagram to find the probability
Illustration of the anatomy of a normal subject (A) and a patient with sleep apnea (B) Illustration of the anatomy of a normal subject (A) and a patient with sleep apnea (B)
Video: Burn Animation

For a complete list of videos, visit our video library