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 68 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?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Fire Rainbow Fire Rainbow
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
Piaget was one of the first to go beyond observable behavior in an attempt to determine how infants ... Piaget was one of the first to go beyond observable behavior in an attempt to determine how infants ...
How to Factor a Difference of Squares How to Factor a Difference of Squares
How to use the discriminant to determine the value of k in a quadratic with no real roots How to use the discriminant to determine the value of k in a quadratic with no real roots
Given the values of sin θ, determine the values of θ over the interval [0, 2pi] Given the values of sin θ, determine the values of θ over the interval [0, 2pi]
Video: Vascular tissues in a corn stem and a buttercup root

For a complete list of videos, visit our video library