« previous next »

Author Question: Which of the following measurements likely has a normal distribution, at least approximately? a. ... (Read 187 times)

beccaep

  • Hero Member
  • *****
  • Posts: 535
on: Jul 24, 2018
Which of the following measurements likely has a normal distribution, at least approximately?
 a. Weights of 10-year old boys.
  b. IQ scores of 12 graders.
  c. Nationwide scores on the SAT (Scholastic Achievement Test).
  d. All of the above.

Question 2

Suppose a professor sees that his students' exam scores do not follow a normal curve, but he decides to assign grades by grading on a bell-shaped curve anyway. Explain how this procedure tends to distort the grades.


SamMuagrove

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

THIS PROCEDURE HAS A TENDENCY TO ARTIFICIALLY SPREAD OUT CLUMPS OF STUDENTS WHO ARE AT THE TOP OR BOTTOM OF THE SCALE, SO THAT STUDENTS WHOSE SCORES WERE VERY CLOSE TOGETHER MAY RECEIVE DIFFERENT LETTER GRADES.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« 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?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Changes in bronchioles during an asthma attack: (A) normal bronchiole and (B) in asthma attack. Changes in bronchioles during an asthma attack: (A) normal bronchiole and (B) in asthma attack.
Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
A, Normal intravertebral disk; B, herniated disk. A, Normal intravertebral disk; B, herniated disk.
Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
Pediatric Vital Signs Normal Ranges Pediatric Vital Signs Normal Ranges
Distribution of Modern Day Oceanic Plateaus and Fragments Distribution of Modern Day Oceanic Plateaus and Fragments
Video: Regulation of GFR: three methods, autoregulation & autoregulation via myogenic mechanism

For a complete list of videos, visit our video library