Author Question: A corporation has 15,000 employees. Sixty-two percent of the employees are male. Twenty-three ... (Read 130 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?

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?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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.

For a complete list of videos, visit our video library