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 121 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?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Alternation of generations, the plant life cycle Alternation of generations, the plant life cycle
The life cycle of a flowering plant. The life cycle of a flowering plant.
season of life season of life
Among the health benefits of marriage is a longer life. Among the health benefits of marriage is a longer life.
Step-Wise Treatment of Asthma in Children > 12 Years of Age and Adults Step-Wise Treatment of Asthma in Children > 12 Years of Age and Adults
Prevalence of good health in Canadians aged 65 years and older Prevalence of good health in Canadians aged 65 years and older
Video: Aneurysm

For a complete list of videos, visit our video library