Homework Answers
Given information:
Significance level = Alpha = 0.01 (99% confident)
E = 0.04 (Difference in proportions)
The formula to calculate the sample size is:
z0.005 = 2.576
n = 0.25 * (2.576/0.04)2 = 1037
Correct option: D) 1037
Add Answer to:
3. A senator wishes to estimate the proportion of United States voters who favor abolishing the...
A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How...
A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%? O A. 6,787 O B. 30 O c. 3,394 OD. 2,401 Click to select your answer.
Suppose we conduct a poll to estimate the proportion of voters who favor a major presidential...
Suppose we conduct a poll to estimate the proportion of voters who favor a major presidential candidate. Assuming that 50 percent of the electorate could be in favor of the candidate, determine the sample size needed so that we are 95 percent confident that pˆ , the sample proportion of voters who favor the candidate, is within a margin of error of .01 of p, the population proportion of all voters who are in favor of the candidate. n =...
A researcher at a major hospital wishes to estimate the proportion of the adult population of...
A researcher at a major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 6%
A researcher at a major clinic wishes to estimate the proportion of the adult population of...
A researcher at a major clinic wishes to estimate the proportion of the adult population of the United States that has a certain health condition. How large of a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 3%? Group of answer choices 1113 1068 752 1344 1535
A pollster wishes to estimate the true proportion of U.S. voters who oppose capital punishment. How...
A pollster wishes to estimate the true proportion of U.S. voters who oppose capital punishment. How many voters should be surveyed in order to be 95% confident that the true proportion is estimated to within 2%?
4. A researcher at a Mayo Clinic wishes to estimate the proportion of the adult population...
4. A researcher at a Mayo Clinic wishes to estimate the proportion of the adult population of the United States that has sleep deprivation. Determine how large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 3%? The lengths of certain machine components are normally distributed with a mean of 3 a standard deviation of 0.11m. Find the two lengths that separate the top 4%...
A researcher wishes to estimate, with 95% confidence, the percentage of adults who support abolishing the...
A researcher wishes to estimate, with 95% confidence, the percentage of adults who support abolishing the penny. His estimate must be accurate within 5% of the true proportion. a) Find the minimum sample size needed, using a prior study that found that 32% of the respondents said they support abolishing the penny . b) No preliminary estimate is available. Find the minimum sample size needed. a) What is the minimum sample size needed using a prior study that found that...
Suppose two researchers want to estimate the proportion of American college students who favor abolishing the...
Suppose two researchers want to estimate the proportion of American college students who favor abolishing the penny. They both want to have about the same margin of error to estimate this proportion. However, Researcher 1 wants to estimate with 99% confidence and Researcher 2 wants to estimate with 95% confidence. Which researcher would need more students for her study in order to obtain the desired margin of error? Researcher 1 Researcher 2 Both researchers would need the same number of...
A researcher at a major hospital wishes to estimate the proportion of the adult population of the U
A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the tgrue proportion by more than 4%?
3. The Pew Research Center wishes to estimate the proportion of adults who are aware of...
3. The Pew Research Center wishes to estimate the proportion of adults who are aware of Instagram. How many adults must the marketing firm randomly survey if they want to be 96% confident that the proportion of adults who are aware of Instagram is within 3% of the true proportion of adults who are aware of Instagram? Enter answer 4 The mean age of a sample of 40 college students is 23.95 with a standard deviation of 2.55. Assume that...
A pollster wishes to estimate the proportion of United States voters who favor capital punishment. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%? O A. 6,787 O B. 30 O c. 3,394 OD. 2,401 Click to select your answer.
4. A researcher at a Mayo Clinic wishes to estimate the proportion of the adult population of the United States that has sleep deprivation. Determine how large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 3%? The lengths of certain machine components are normally distributed with a mean of 3 a standard deviation of 0.11m. Find the two lengths that separate the top 4%...
Suppose two researchers want to estimate the proportion of American college students who favor abolishing the penny. They both want to have about the same margin of error to estimate this proportion. However, Researcher 1 wants to estimate with 99% confidence and Researcher 2 wants to estimate with 95% confidence. Which researcher would need more students for her study in order to obtain the desired margin of error? Researcher 1 Researcher 2 Both researchers would need the same number of...
3. The Pew Research Center wishes to estimate the proportion of adults who are aware of Instagram. How many adults must the marketing firm randomly survey if they want to be 96% confident that the proportion of adults who are aware of Instagram is within 3% of the true proportion of adults who are aware of Instagram? Enter answer 4 The mean age of a sample of 40 college students is 23.95 with a standard deviation of 2.55. Assume that...
Most questions answered within 3 hours.
-
Part 1- Inventory: You own a toy company and
you are producing wooden rocking horses. Assume...
asked 6 minutes ago -
What is aromaticity?
Identify aromatic molecules, especially those containing O, N,
S and B
asked 9 minutes ago -
A rubber solid circular wheel of uniform density spins about it
axis at rate of 60...
asked 20 minutes ago -
DNA evidence from an early human skeleton in Britain, shows that
early inhabitants of were blue...
asked 12 minutes ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 20 minutes ago -
To practice Problem-Solving Strategy 19.1 Work in Ideal-gas
Processes.
A cylinder with initial volume V contains...
asked 29 minutes ago -
Depreciation for Partial Periods Bean Delivery Company purchased
a new delivery truck for $35,400 on April...
asked 33 minutes ago -
Q 5.23:
Jonathan has been doing calculations to determine a missing
component. So far he has...
asked 31 minutes ago -
Use indifference curve and the daily income-leisure choice model
to explain graphically the behavior of employees...
asked 51 minutes ago -
Record the following transactions of Fashion Park in a
general journal. Fashion Park must charge 8...
asked 52 minutes ago -
Chapter 08 Python Assignment: Question 1-5
Please I need help in my python course.
Question 1...
asked 56 minutes ago -
1.
In a study of the effectiveness of
a new pain killer,
4646
out of
821821...
asked 1 hour ago