« previous next »

Author Question: When conducting a hypothesis test for the population mean when sigma is known and the sample size is ... (Read 96 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jun 24, 2018
When conducting a hypothesis test for the population mean when sigma is known and the sample size is 30 or more, the test statistic follows the ___________________ ____________.
 
  A) Student's t-distribution
  B) binomial distribution
  C) normal distribution
  D) exponential distribution

Question 2

Suppose the average tread-life of a certain brand of tire is 42,000 miles and that this mileage follows the exponential probability distribution.
 
  What is the probability that a randomly selected tire will have a tread-life between 30,000 and 50,000 miles?A) 0.1854
  B) 0.2719
  C) 0.5105
  D) 0.6959


reversalruiz

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Examining the survivorship curve of a Dall mountain sheep population reveals information on the caus Examining the survivorship curve of a Dall mountain sheep population reveals information on the caus
Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to
The frontal sinus, an airfilled space just behind the brow, is a unique size and shape in each of us The frontal sinus, an airfilled space just behind the brow, is a unique size and shape in each of us
Suture Use, Size, and Type of Material Suture Use, Size, and Type of Material
Sample prescriptions of antibiotics for dental infections. Sample prescriptions of antibiotics for dental infections.
Popular Methods of Conducting Social Science Research Popular Methods of Conducting Social Science Research
Video: Green alga life cycle Animation

For a complete list of videos, visit our video library