« previous next »

Author Question: When conducting a hypothesis test for the population mean when sigma is known and the sample size is ... (Read 104 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 more bacteria in your mouth than there are people in the world.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Earthquakes—Another Test For Plate Tectonics Earthquakes—Another Test For Plate Tectonics
A Test for the Blind Spot A Test for the Blind Spot
Population and Settlement Population and Settlement
Benedict's test results Benedict's test results
Demographic transition model for changes in population growth rates and sizes, correlated with long- Demographic transition model for changes in population growth rates and sizes, correlated with long-
Video: Ventilation - phases and driving forces

For a complete list of videos, visit our video library