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

Author Question: Are the 95 confidence intervals for the population mean, using t tables and using the z table ... (Read 79 times)

chandani

  • Hero Member
  • *****
  • Posts: 541
Are the 95 confidence intervals for the population mean, using t tables and using the z table assuming that the population standard deviation is known to be 0.16, of roughly similar size? Explain.
 
  What will be an ideal response?

Question 2

How should the researcher interpret the coefficient of the dummy variable?
 
  A) Households with both adults working approximately spend 43.20 on groceries, under the assumption that all the other independent variables in the model are held constant.
  B) Households with both adults working spend, on average, 43.20 less than other households, under the assumption that all the other independent variables in the model are held constant.
  C) Households with both adults working spend, on average, 43.20 more than other households, under the assumption that all the other independent variables in the model are held constant.
  D) There is no difference between the types of households and their spending on groceries, under the assumption that all the other independent variables in the model are held constant.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ynlevi

  • Sr. Member
  • ****
  • Posts: 338
Answer to Question 1

The two intervals are almost the same. The artificial (and probably incorrect) assumption that  is equal to s allows us to quote a slightly narrower interval.

Answer to Question 2

C




chandani

  • Member
  • Posts: 541
Reply 2 on: Jun 24, 2018
Wow, this really help


tanna.moeller

  • Member
  • Posts: 328
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

For a complete list of videos, visit our video library