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

Author Question: Two fire alarms A and B are tested independently to determine if there is a statistical difference ... (Read 35 times)

scienceeasy

  • Hero Member
  • *****
  • Posts: 565
on: Jul 24, 2018
Two fire alarms A and B are tested independently to determine if there is a statistical difference in the mean amount of time it takes to wake up sleeping subjects. What inference can be made from the confidence interval below?
   Two-sample T for Alarm B vs Alarm A
   
   N Mean StDev SE Mean
   Alarm B 8 2.813 0.770 0.27
   Alarm A 7 1.680 0.826 0.31
   
   Difference = mu (Alarm B) - mu (Alarm A)
   Estimate for difference: 1.13250
   95 CI for difference: (0.22963, 2.03537)
   
  1.The interval suggests a statistically significant difference between the two alarms.
  2.The interval does not suggest a statistically significant difference between the two alarms.

Question 2

The number of degrees of freedom used in the two-sample t test for independent samples are the same as the degrees of freedom used in the construction of a confidence interval for 1 - 2.
  1.True
  2.False


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tdewitt

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 24, 2018
Answer to Question 1

1

Answer to Question 2

1


scienceeasy

  • Hero Member
  • *****
  • Posts: 565
Reply #2 on: Jul 24, 2018
TY


tdewitt

  • Sr. Member
  • ****
  • Posts: 318
Reply #3 on: Jul 24, 2018
You're welcome


« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

fire ants fire ants
Using Parallax to Determine Distance Using Parallax to Determine Distance
This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p
A vehicle being tested during an enhanced emissions test. A vehicle being tested during an enhanced emissions test.
Resting Membrane Potential: Voltage Difference Resting Membrane Potential: Voltage Difference
Sheridan Motors is a car dealership that would like to investigate if there is a difference in ... Sheridan Motors is a car dealership that would like to investigate if there is a difference in ...
Video: Bipolar Disorder

For a complete list of videos, visit our video library