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 81 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?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

A small sample of the great diversity of seed sizes and shapes. A small sample of the great diversity of seed sizes and shapes.
Administration of the Rinne test. Administration of the Rinne test.
A typical spectrum with peaks representing the peptide fragments generated from a sample A typical spectrum with peaks representing the peptide fragments generated from a sample
Booker T. Washington in his office at Tuskegee Institute, 1900. Washington chose a policy of accommo Booker T. Washington in his office at Tuskegee Institute, 1900. Washington chose a policy of accommo
Are the resutls from the glucose strip test consistent with the results obtained from the ... Are the resutls from the glucose strip test consistent with the results obtained from the ...
Morgan’s test-cross analysis of genetic linkage between autosomal genes Morgan’s test-cross analysis of genetic linkage between autosomal genes
Video: Digestive chemicals - types & enzymes

For a complete list of videos, visit our video library