This topic contains a solution. Click here to go to the answer

Author Question: A research wants to take a simple random sample of about 10 of the factory workers at two ... (Read 389 times)

tatyanajohnson

  • Hero Member
  • *****
  • Posts: 569

  A research wants to take a simple random sample of about 10 of the factory workers at two different factories to study the number of hours worked per week. Factory A has approximately 10,000 employees and Factory B has about 25,000 employees. Which of the following statements is correct if Factory A and Factory B come from the same population?
 

  a.The sampling variability will be higher for Factory A than for Factory B.
  b.The average number of hours must be known to make a statement about the sampling variability.
  c.The sampling variability will be lower for Factory A than for Factory B.
  d.The sampling variability will be the same for both Factory A and Factory B.

Question 2


  Which of the following is true with respect to the sampling distribution of sample means?
 

  a.If all possible random samples, each of size n, are taken from any population with mean and standard deviation , the sampling distribution of the sample mean will have a mean equal to and a standard deviation equal to .
  b.Only if the sampled population has a normal distribution then all possible random samples, each of size n, will also have a normal distribution with mean and standard deviation . The sampling distribution of the sample mean will have a mean equal to and a standard deviation equal to . This is not true if the population is not normally distributed.
  c.If all possible random samples, each of size n, are taken from any population with mean and standard deviation , the sampling distribution of the sample mean will have a mean equal to and a standard deviation equal to .
  d.If all possible random samples, each of size n, are taken from any population with mean and standard deviation , the sampling distribution of the sample mean will have a mean equal to and a standard deviation equal to .



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Cnarkel

  • Sr. Member
  • ****
  • Posts: 339
Answer to Question 1

correct: a

Answer to Question 2

correct: a




tatyanajohnson

  • Member
  • Posts: 569
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review


kilada

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Excellent

 

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

For a complete list of videos, visit our video library