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 88 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
Gracias!

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

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?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

An example of layers, or strata, of sedimentary rock that contain fossils An example of layers, or strata, of sedimentary rock that contain fossils
Wombat scat, found near Cradle Mountain in Tasmania Wombat scat, found near Cradle Mountain in Tasmania
Only 750 mountain gorillas remain in two tiny forests in East Africa. Only 750 mountain gorillas remain in two tiny forests in East Africa.
On May 15, 1916, after deliberating for one hour, an all-white jury in Waco, Texas, found seventeen- On May 15, 1916, after deliberating for one hour, an all-white jury in Waco, Texas, found seventeen-
Rock Art: Boat And Sea Battle Rock Art: Boat And Sea Battle
Half Leg of Lamb Half Leg of Lamb
Video: Bone processes - resorption and deposition, remodeling and response to stress in adult bones

For a complete list of videos, visit our video library