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

Author Question: A professional rock climber claims that he can climb a particular mountain within half an hour. From ... (Read 100 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jun 24, 2018
A professional rock climber claims that he can climb a particular mountain within half an hour. From a random sample of 20 attempts, the rock climber averaged 33.3 minutes with a standard deviation of 3.9 minutes.
 
  Is there sufficient evidence to suggest that the climber's claim is incorrect at a significance level of 10 per cent?

Question 2

What is the value of A?
 
  A) 6
  B) 5
  C) 3
  D) 2


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chreslie

  • Sr. Member
  • ****
  • Posts: 307
Reply #1 on: Jun 24, 2018
Answer to Question 1

H0 :   30 against H1 :  > 30
Test statistic t = (33.3 - 30 / (3.9/4.5 ) = 3.8
Since t19,0.1 = 1.328, we reject H0 at   0.1
Therefore, there is sufficient evidence to disprove the climber's claim.

Answer to Question 2

C


drink

  • Member
  • Posts: 554
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

matt95

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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.

Immunization with a vaccine. A healthcare professional is injecting a vaccine into the patient’s arm Immunization with a vaccine. A healthcare professional is injecting a vaccine into the patient’s arm
Limestone: A Marine Sedimentary Rock Limestone: A Marine Sedimentary Rock
One way to illustrate the journey of adulthood is with the image of a mountain landscape. One begins ... One way to illustrate the journey of adulthood is with the image of a mountain landscape. One begins ...
A health care professional taking a radial pulse and common pulse points. A health care professional taking a radial pulse and common pulse points.
A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ... A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ...
Mountain Glaciers Mountain Glaciers
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library