This topic contains a solution. Click here to go to the answer

Author Question: A professional rock climber claims that he can climb a particular mountain within half an hour. From ... (Read 104 times)

drink

  • Hero Member
  • *****
  • Posts: 554
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
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


gcook

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Gracias!

 

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

For a complete list of videos, visit our video library