« previous next »

Author Question: Grades for a statistics exam for a certain class follow the normal probability distribution with a ... (Read 46 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?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Sickled and normal red blood cells Sickled and normal red blood cells
Normal right tympanic membrane Normal right tympanic membrane
Sociologists disagree about the relative significance of race and social class in determining social ... Sociologists disagree about the relative significance of race and social class in determining social ...
The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion. The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion.
The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ... The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ...
The Distribution of Growth Rates, 1975–2009 The Distribution of Growth Rates, 1975–2009
Video: Transmission Across a Synapse

For a complete list of videos, visit our video library