This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Two independent samples of sizes 25 and 35 are randomly selected from two normal populations with ... (Read 163 times)

mp14

  • Hero Member
  • *****
  • Posts: 534
on: Jun 24, 2018
Two independent samples of sizes 25 and 35 are randomly selected from two normal populations with equal variances (assumed to be unknown). In order to test the difference between the population means, the test statistic is:
 a. a standard normal random variable.
  b. approximately standard normal random variable.
  c. Student t-distributed with 58 degrees of freedom.
  d. Student t-distributed with 33 degrees of freedom.

Question 2

The time series component that reflects a long-term, relatively smooth pattern or direction exhibited by a time series over a long time period is called seasonal.
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lgoldst9

  • Sr. Member
  • ****
  • Posts: 372
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

F


mp14

  • Hero Member
  • *****
  • Posts: 534
Reply #2 on: Jun 24, 2018
Thank you :)


lgoldst9

  • Sr. Member
  • ****
  • Posts: 372
Reply #3 on: Jun 24, 2018
Happy to help you


« previous next »
 

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Vision. Normal vision and vision problems. Vision. Normal vision and vision problems.
Pediatric Vital Signs Normal Ranges Pediatric Vital Signs Normal Ranges
Standardization of Selected Herbal Products Standardization of Selected Herbal Products
Normal oxygen sensor frequency is from about one to five times per second. Normal oxygen sensor frequency is from about one to five times per second.
Electrophoresis gel in a densitometer. SPE densitometry showing a normal pattern. Electrophoresis gel in a densitometer. SPE densitometry showing a normal pattern.
Identical Twin Normal Birth Position Identical Twin Normal Birth Position
Video: Gastroesophageal Reflux Disease (GERD)

For a complete list of videos, visit our video library