« previous next »

Author Question: Which of the following measurements likely has a normal distribution, at least approximately? a. ... (Read 150 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?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

A comparison between chromosomes found in a normal human cell and a cancer cell from the same person A comparison between chromosomes found in a normal human cell and a cancer cell from the same person
Desert distribution and climate Desert distribution and climate
Normal portal circulation. Normal portal circulation.
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
The homeostatic control of normal body temperature (37°C or 98.6°F). The homeostatic control of normal body temperature (37°C or 98.6°F).
Three factors that influence the distribution of Na+ and K+ ions across the neural membrane. Three factors that influence the distribution of Na+ and K+ ions across the neural membrane.
Video: Acid-base imbalances - metabolic acidosis and alkalosis

For a complete list of videos, visit our video library