« previous next »

Author Question: Which of the following measurements likely has a normal distribution, at least approximately? a. ... (Read 172 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?

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

Did you know?

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

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Normal glomerulus. Acute glomerulonephritis. Normal glomerulus. Acute glomerulonephritis.
Appendicitis. (a) A normal appendix. (b) An inflamed appendix in appendicitis. Appendicitis. (a) A normal appendix. (b) An inflamed appendix in appendicitis.
EEG recordings showing the differences between normal, absence seizure, and generalized tonic–clonic EEG recordings showing the differences between normal, absence seizure, and generalized tonic–clonic
Normal Recommended Daily Intakes for Calcium Normal Recommended Daily Intakes for Calcium
Distribution and Forms of Precipitation: Graupel and Hail Distribution and Forms of Precipitation: Graupel and Hail
Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri
Video: Introduction to Diabetes

For a complete list of videos, visit our video library