This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Scores of high school students on a national mathematics exam in Egypt were normally distributed ... (Read 172 times)

cagreen833

  • Hero Member
  • *****
  • Posts: 544
on: Jun 24, 2018
Scores of high school students on a national mathematics exam in Egypt were normally distributed with a mean of 86 and a standard deviation of 4. A) What is the probability that a randomly selected student will have a score of 80 or higher? B) If there were 97,680 students with scores higher than 91, how many students took the test? ___________________ _ (Remove all commas from your answer before submitting).
 Fill in the blank(s) with correct word

Question 2

Which of the following statements are correct?
 a. A confidence level expresses the degree of certainty that an interval will include the actual value of the population parameter.
  b. A confidence level expresses the degree of certainty that a point estimate will include the actual value of the population parameter.
  c. A confidence level expresses the degree of certainty that an interval will include the actual value of the sample statistic.
  d. A confidence level expresses the degree of certainty that a point estimate will include the actual value of the sample statistic.
  e. None of these statements is correct.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mfedorka

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.9332; 925000

Answer to Question 2

A


cagreen833

  • Member
  • Posts: 544
Reply 2 on: Jun 24, 2018
:D TYSM

LegendaryAnswers

  • Member
  • Posts: 341
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

(a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr (a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr
Over the past four decades, the self-reported health of married men and women has remained high, ... Over the past four decades, the self-reported health of married men and women has remained high, ...
HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ... HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ...
Ratio of College Wages to High-School Wages Ratio of College Wages to High-School Wages
Video: Forming urine ( influencing factors), Forming dilute urine & Forming concentrated urine

For a complete list of videos, visit our video library