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

Author Question: A random sample of 25 third graders scored an average of 3.2 on a standardized reading test. The ... (Read 210 times)

schs14

  • Hero Member
  • *****
  • Posts: 569
on: Jul 24, 2018
A random sample of 25 third graders scored an average of 3.2 on a standardized reading test. The standard deviation was 0.95 . Calculate a 99 confidence interval for the mean score on this test.
 a. (3.01, 3.39)
  b. (2.49, 3.91)
  c. (2.81, 3.59)
  d. None of the above

Question 2

Midterm Exam Results reported as z-scores.Greg is in another section of the course. The distribution of midterm scores for his section was reported as being approximately normal with a mean of 62 and a standard deviation of 8 . Greg's standardized score is +1 . What is Greg's midterm score?

Question 3

A randomly selected sample of n =51 men in Brazil had an average lifespan of 59 years. The standard deviation was 10 years. Calculate a 98 confidence interval for the average lifespan for all men in Brazil.
 a. (55.6, 62.4)
  b. (56.2, 61.8)
  c. (35.0, 83.0)
  d. None of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

katieost

  • Sr. Member
  • ****
  • Posts: 358
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

Z = +1 implies Greg's score is 1 standard deviation above the mean = 62 + 1(8) = 70 points

Answer to Question 3

A


schs14

  • Hero Member
  • *****
  • Posts: 569
Reply #2 on: Jul 24, 2018
TY


katieost

  • Sr. Member
  • ****
  • Posts: 358
Reply #3 on: Jul 24, 2018
You're welcome


« previous next »
 

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Change in Emotional States During Adolescence Average emotional state becomes teadilyi more negativ Change in Emotional States During Adolescence Average emotional state becomes teadilyi more negativ
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
Sample Daily Log For Holistic Self-Care Plan. Sample Daily Log For Holistic Self-Care Plan.
Controlled Scientific Experiments Scientists use experimental research to test hypotheses Controlled Scientific Experiments Scientists use experimental research to test hypotheses
Normal and abnormal corneal light reflection test Normal and abnormal corneal light reflection test
The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ... The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ...
Video: Interview with an Anorexic Woman (Part 1 of 2)

For a complete list of videos, visit our video library