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 115 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?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

A web of life A web of life
Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons
Examples of Impacts Associated with Different Amounts of Global Average Temperat Examples of Impacts Associated with Different Amounts of Global Average Temperat
Women dine out Women dine out
Life Cycle Nutrition: Pregnancy through Infancy Life Cycle Nutrition: Pregnancy through Infancy
Chlamydomonas Life Cycle Chlamydomonas Life Cycle
Video: Virtual Enzyme Kinetics & Lineweaver Burk Plot

For a complete list of videos, visit our video library