Author Question: If a contingency table shows the sex and classification of undergraduate students (freshman, ... (Read 92 times)

LaDunn

  • Hero Member
  • *****
  • Posts: 526
If a contingency table shows the sex and classification of undergraduate students (freshman, sophomore, junior, senior) in your statistics class, which of the following is true?
 a. The sex of the student is an example of mutually exclusive events.
  b. Because yours is an undergraduate class, the events are exhaustive, i.e., each student must fall in one of the classifications.
  c. An example for the intersection of events would be the number of males who are juniors.
  d. An example for the union of events would be the number of students who are female or juniors.
  e. All of these are true.

Question 2

Texas passed a law requiring drivers and passengers in the front seat to wear seat belts. In order to estimate the compliance with the law an unmarked car will operate in a selected county and the officer will observe whether or not seat belts are in use. The proportion complying, , in the county is to be estimated by randomly selecting the cars to examine. A confidence coefficient of 0.98 is desired with the estimate, p, to be within 0.05 of the true proportion. If an average number of cars passing the observation point per day is 12,000, how many cars are needed in this sample?



ktidd

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

E

Answer to Question 2

518



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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 human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

For a complete list of videos, visit our video library