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

Author Question: Random samples of 5 Japanese women and 10 Japanese men showed an average life span of 83 years for ... (Read 76 times)

SAVANNAHHOOPER23

  • Hero Member
  • *****
  • Posts: 542
on: Jul 24, 2018
Random samples of 5 Japanese women and 10 Japanese men showed an average life span of 83 years for the women and 77 years for the men. The standard deviation was 2 years for the women and 1 year for the men. Calculate a 95 confidence interval for the difference in average life spans (women - men). Assume that the life spans are normally distributed, but do not assume the population variances are equal, and use the conservative by-hand estimate for the degrees of freedom.

Question 2

Sleep apnea is a condition involving irregular breathing during sleep. Suppose that 20 of a population of men experience sleep apnea. A random sample of n = 64 men is to be drawn from this population. What is the mean of the sampling distribution for the sample proportion of men who experience sleep apnea?
 a. 20/64
  b. 0.20
  c. 0.80
  d. It depends on the value of the sample proportion.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jody Vaughn

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 24, 2018
Answer to Question 1

(3.36, 8.64)

Answer to Question 2

B


SAVANNAHHOOPER23

  • Hero Member
  • *****
  • Posts: 542
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


Jody Vaughn

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

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?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Cell division in common life cycles Cell division in common life cycles
More young men than women live in their parents’ homes, though the proportion for both decreases ... More young men than women live in their parents’ homes, though the proportion for both decreases ...
The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ... The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ...
Proportion of Women and Men in the U.S. Labor Force Proportion of Women and Men in the U.S. Labor Force
During their elderly years, men and women continue to exhibit aspects of the gender roles that they ... During their elderly years, men and women continue to exhibit aspects of the gender roles that they ...
Half-life explained Half-life explained
Video: Digestion Animation

For a complete list of videos, visit our video library