« previous next »

Author Question: A population proportion is to be estimated and a 95 degree of confidence is desired. In general, if ... (Read 57 times)

Alygatorr01285

  • Hero Member
  • *****
  • Posts: 564
on: Jul 25, 2018
A population proportion is to be estimated and a 95 degree of confidence is desired. In general, if one wishes to decrease the margin of error by a factor of 3 (for example from E = 0.03 to 0.01), how will the necessary sample size change?
 
  A) It will decrease by a factor of 9 B) It will increase by a factor of 9
  C) It will increase by a factor of 3 D) It will decrease by a factor of 3

Question 2

In a random sample of 360 women, 65 favored stricter gun control laws. In a random sample of 220 men, 60 favored stricter gun control laws.
 
  At the 0.05 significance level, do the data provide sufficient evidence to conclude that the proportion of women favoring stricter gun control is higher than the proportion of men favoring stricter gun control?


shaquita

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 25, 2018
Answer to Question 1

B

Answer to Question 2

H0: p1 = p2, Ha: p1 > p2.
 = 0.05
Test statistic: z = 1.21. P-value = 0.1131
Do not reject the null hypothesis. At the 5 significance level, the data do not provide sufficient evidence to conclude that the proportion of women favoring stricter gun control is higher than the proportion of men favoring stricter gun control.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Area of Manatee Population Area of Manatee Population
Estimated Daily Protein Needs Estimated Daily Protein Needs
Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont. Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont.
Hives is a general contraindication in the acute phase and a local contraindication in the subacute ... Hives is a general contraindication in the acute phase and a local contraindication in the subacute ...
General Mathematics General Mathematics
HIV in population worldwide HIV in population worldwide
Video: Resting membrane potential - electrical polarity and maintenance requirements

For a complete list of videos, visit our video library