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 95 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?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

TB skin test. TB skin test.
Sample inventory order form. Sample inventory order form.
Diesel Emission Testing - Opacity Test. Diesel Emission Testing - Opacity Test.
Schamroth test A. Healthy nail B. Clubbing Schamroth test A. Healthy nail B. Clubbing
Data for a Hypothetical Paternity Test Using 13 CODIS Genes Data for a Hypothetical Paternity Test Using 13 CODIS Genes
The fluctuation test of Luria and Delbrück The fluctuation test of Luria and Delbrück
Video: Activation Energy - Valence Electrons

For a complete list of videos, visit our video library