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

Author Question: You are taking a class with a large number of students. The professor notes that the midterm exam ... (Read 158 times)

dbose

  • Hero Member
  • *****
  • Posts: 597
on: Jul 24, 2018
You are taking a class with a large number of students. The professor notes that the midterm exam scores were bell-shaped but doesn't tell you the mean. You take a random sample of 10 students and construct a 95 confidence interval for the mean exam score. Now the professor wants to give everyone 5 extra points on the exam. How will your confidence interval change?
 a. The sample mean will increase by 5 points and the margin of error will also.
  b. The sample mean will increase by 5 points but the margin of error will stay the same.
  c. The sample mean will stay the same but the margin of error will increase by 5 points.
  d. Both the sample mean and the margin of error will remain unchanged.

Question 2

Which of the following statements is not true regarding a 95 confidence interval for the mean of a population?
 a. In 95 of all samples, the sample mean will fall within 2 standard errors of the true population mean.
  b. 95 of the population values will lie within 2 standard errors of the sample mean.
  c. In 95 of all samples, the true population mean will be within 2 standard errors of the sample mean.
  d. If you add and subtract two standard errors to/from the sample mean, in 95 of all cases you will have captured the true population mean.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

asdfasdf

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 24, 2018
Answer to Question 1

B

Answer to Question 2

B


dbose

  • Hero Member
  • *****
  • Posts: 597
Reply #2 on: Jul 24, 2018
Thank you!


asdfasdf

  • Sr. Member
  • ****
  • Posts: 339
Reply #3 on: Jul 24, 2018
Always glad to help...


« previous next »
 

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Any number of crossovers gives 50 percent recombinants Any number of crossovers gives 50 percent recombinants
genetics notes genetics notes
Phyllis Schlafly drew much of her support from working-class women who were left vulnerable by the ... Phyllis Schlafly drew much of her support from working-class women who were left vulnerable by the ...
Average Number of Days per Year with Thunderstorms Average Number of Days per Year with Thunderstorms
Which of the following is the most reasonable estimate of the number of characters (typed ... Which of the following is the most reasonable estimate of the number of characters (typed ...
Growing snails in class room sk Growing snails in class room sk
Video: Anaphylaxis Animation

For a complete list of videos, visit our video library