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 87 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?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Some Alleles Do Not Assort Independently Some Alleles Do Not Assort Independently
Using Parallax to Determine Distance Using Parallax to Determine Distance
Difference between Functional and Cross-Functional team Difference between Functional and Cross-Functional team
If P(θ) = (√3 /2, -1/ 2), determine the coordinates of P (θ + 90 °) using the unit circle If P(θ) = (√3 /2, -1/ 2), determine the coordinates of P (θ + 90 °) using the unit circle
Use the information in the above table to establish a Born-Haber cycle to determine the ... Use the information in the above table to establish a Born-Haber cycle to determine the ...
Three proposed mechanisms of DNA replication tested by Meselson and Stahl Three proposed mechanisms of DNA replication tested by Meselson and Stahl
Video: Metabolic Rate, Heat and Thermoregulation - response to heat and cold stresses

For a complete list of videos, visit our video library