« previous next »

Author Question: A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. ... (Read 54 times)

kellyjaisingh

  • Hero Member
  • *****
  • Posts: 540
on: Aug 1, 2018
A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm.
 
  Assuming that the population standard deviation is known to be 1.6 cm, use a 0.05 significance level to test the claim that the mean circumference of all pumpkins is equal to 39.9 cm.

Question 2

A coin is tossed 20 times. A person, who claims to have extrasensory perception, is asked to predict the outcome of each flip in advance. She predicts correctly on 16 tosses.
 
  What is the probability of being correct 16 or more times by guessing? Does this probability seem to verify her claim?
  A) 0.0069 , no B) 0.4931 , no C) 0.0069 , yes D) 0.4931 , yes


amandanbreshears

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Aug 1, 2018
Answer to Question 1

:  = 39.9; :   39.9. Test statistic: 3.75. P-value: 0.0002. Reject . There is sufficient evidence to warrant rejection of the claim that the mean equals 39.9 cm.

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia. Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia.
Sample Checklist of Opening and Closing Duties Sample Checklist of Opening and Closing Duties
Sample Teaching Plan for Hypertension Cont. Sample Teaching Plan for Hypertension Cont.
Where’s the Saturated Fat in Your Foods? Saturated fat is found in animal products, tropical oils Where’s the Saturated Fat in Your Foods? Saturated fat is found in animal products, tropical oils
Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ... Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ...
A fictional element named Nivadium is found to have three naturally occurring is A fictional element named Nivadium is found to have three naturally occurring is
Video: Secondary and tertiary levels of protein structure Animation

For a complete list of videos, visit our video library