« previous next »

Author Question: Grades for a statistics exam for a certain class follow the normal probability distribution with a ... (Read 90 times)

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
on: Jun 24, 2018
Grades for a statistics exam for a certain class follow the normal probability distribution with a mean of 82 and a standard deviation of 12 . What percentage of the students in the class earned a B grade (80-89)?

Question 2

True or False If we want to cut the maximum likely error in half, we will have to double the sample size.
  Indicate whether the statement is true or false


deja

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.2865

Answer to Question 2

F


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Clinal map of the distribution of HbS in Africa. Clinal map of the distribution of HbS in Africa.
Functionalist and Conflict Views of Stratification: The Distribution of Society's Resources Functionalist and Conflict Views of Stratification: The Distribution of Society's Resources
Normal heart valves Normal heart valves
People with normal color vision see the number 29 in the chart; however, those who are color-blind c People with normal color vision see the number 29 in the chart; however, those who are color-blind c
Distribution of glucose-6-phosphate dehydrogenase (G6PD) deficiency in various Jewish populations. B Distribution of glucose-6-phosphate dehydrogenase (G6PD) deficiency in various Jewish populations. B
Trimodal distribution of trauma deaths Trimodal distribution of trauma deaths
Video: Epidural Hematoma

For a complete list of videos, visit our video library