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

Author Question: Many textbooks (though not this one) advocate testing the mean of a sample against a hypothesized ... (Read 58 times)

crazycityslicker

  • Hero Member
  • *****
  • Posts: 537
on: Jun 20, 2018
Many textbooks (though not this one) advocate testing the mean of a sample against a hypothesized population mean by using z even if the population standard deviation is not known, so long as the sample size exceeds 30. Those books recommend this because
 
  a. they don't know any better.
  b. there are not tables for t for more than 30 degrees of freedom.
  c. the difference between t and z is small for that many cases.
  d. t and z are exactly the same for that many cases.

Question 2

If the standard deviation of the population is 15 and we repeatedly draw samples of 25 observations each, the resulting sample means will have a standard error of
 
  a. 2
  b. 3
  c. 15
  d. 0.60


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fromAlphatoOmega22

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jun 20, 2018
Answer to Question 1

C

Answer to Question 2

B


crazycityslicker

  • Member
  • Posts: 537
Reply 2 on: Jun 20, 2018
Thanks for the timely response, appreciate it

mcabuhat

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Sample Exercise Program for Healthy Older Adults (cont.) Sample Exercise Program for Healthy Older Adults (cont.)
Diesel Emission Testing - Opacity Test. Diesel Emission Testing - Opacity Test.
ABO and Rh grouping using gelatin centrifugation. The blood sample above is AB negative as indicated ... ABO and Rh grouping using gelatin centrifugation. The blood sample above is AB negative as indicated ...
Sample time management planning chart for a massage student. Sample time management planning chart for a massage student.
E chart for testing distant vision E chart for testing distant vision
The distribution of the number of hours that a random sample of people spend doing chores per ... The distribution of the number of hours that a random sample of people spend doing chores per ...
Video: Phlebotomy

For a complete list of videos, visit our video library