Author Question: A corporation has 15,000 employees. Sixty-two percent of the employees are male. Twenty-three ... (Read 98 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
A corporation has 15,000 employees. Sixty-two percent of the employees are male. Twenty-three percent of the employees earn more than 30,000 a year. Eighteen percent of the employees are male and earn more than 30,000 a year.
 a. If an employee is taken at random, what is the probability that the employee is male?
  b. If an employee is taken at random, what is the probability that the employee earns more than 30,000 a year?
  c. If an employee is taken at random, what is the probability that the employee is male and earns more than 30,000 a year?
  d. If an employee is taken at random, what is the probability that the employee is male or earns more than 30,000 a year or both?
  e. The employee taken at random turns out to be male. Compute the probability that he earns more than 30,000 a year.
  f. Are being male and earning more than 30,000 a year independent?

Question 2

A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university is significantly more than 24 . Assume the distribution of the population of ages is normal. Using  = .05, it can be concluded that the population mean age is
 a. not significantly different from 24.
   b. significantly different from 24.
   c. significantly less than 24.
   d. significantly more than 24.



IRincones

  • Sr. Member
  • ****
  • Posts: 321
Answer to Question 1

a. .62
b. .23
c. .18
d. .67
e. .2903
f. No

Answer to Question 2

d



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

There are 60,000 miles of blood vessels in every adult human.

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.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

For a complete list of videos, visit our video library