Author Question: A corporation has 15,000 employees. Sixty-two percent of the employees are male. Twenty-three ... (Read 128 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?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

For a complete list of videos, visit our video library