« previous next »

Author Question: Suppose a 95 confidence interval for the difference between the average age of females employed by ... (Read 265 times)

crobinson2013

  • Hero Member
  • *****
  • Posts: 535
on: Jun 24, 2018

  Suppose a 95 confidence interval for the difference between the average age of females employed by Company A and the average age of females employed by Company B is (-4.7,6.5). Which of the following hypotheses can be tested at the level using the information given?
 

  a.H0: versus Ha:
  b.H0: versus Ha:
  c.H0: versus Ha:
  d.H0: versus Ha:

Question 2


 

If two independent random samples gave the following information, what are the estimated mean and standard error for the difference between the two means under the assumption of equal variances?
  Sample A: nA = 10, , sA = 15
  Sample B: nB = 20, , sB = 10


 

  a.The mean is 200 and the standard error is 12.5.
  b.The mean is 40 and the standard error is 11.84.
  c.The mean is 200 and the standard error is 4.59.
  d.The mean is 40 and the standard error is 4.59.


nmyers

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jun 24, 2018
Answer to Question 1

correct: c

Answer to Question 2

correct: d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Menstrual cycle summary based on a 28-day (average) menstrual cycle. Menstrual cycle summary based on a 28-day (average) menstrual cycle.
Gametogenesis and gametes in males and females. Gametogenesis and gametes in males and females.
Cotton Pygmy Goose - Females resting with a Whiskered Tern near Hodal Cotton Pygmy Goose - Females resting with a Whiskered Tern near Hodal
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
How to Factor a Sum or Difference of Two Cubes How to Factor a Sum or Difference of Two Cubes
What's the Difference Between England, Great Britain, and United Kingdom? What's the Difference Between England, Great Britain, and United Kingdom?
Video: Metabolic Rate, Heat and Thermoregulation - response to heat and cold stresses

For a complete list of videos, visit our video library