Homework Answers
Sample size = Z2 
/2 * p (1 - p) / E2
= 2.8072 * 0.26 ( 1 - 0.26) / 0.052
= 606.4
Sample size = 607 (Rounded up to nearest integer)
Add Answer to:
Question 7 of 7 point tempt of UnledView question in a popup 7 3 Section Exeros...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
7.1 Section Exercise Question 3 of 18 (1 point) Altempt 3 of Unlimited View questlon in...
7.1 Section Exercise Question 3 of 18 (1 point) Altempt 3 of Unlimited View questlon in a popup 7 A sample of size n 87 is drawn from a population whose standard deviation is a Part 1 of 2 (a) Find the margin of error for a 90% confidence interval for . Round the answer to at least three decimal places. The margin of error for a 90% confidence interval for u is Part 2 of 2 (b) If the...
1) According to the national center on health statistics (2004), 22.4% of adults are smokers. A...
1) According to the national center on health statistics (2004), 22.4% of adults are smokers. A random sample of 100 adults is obtained. State the criteria for normality and determine if it has been met in this case. (2pts) by Find the mean and standard error for the sampling distribution of sample proportions (2pts) In a random sample of 100 adults, what is the probability that at most 15 of them are smokers? (4pts) What is the probability of getting...
Question 3 of 26 (3 points) Attempt 1 of Unlimited View question in a popup 8.2...
Question 3 of 26 (3 points) Attempt 1 of Unlimited View question in a popup 8.2 Section EX Baby weight: Following are weights, in pounds, of 10 two-month-old baby girls. It is reasonable to assume that the population is approximately normal. 12.23 12.32 14.13 9.34 11.48 8.63 12.66 10.30 12.34 12.95 Send data to Excel Part: 0/2 Part 1 of 2 Construct an 80% interval for the mean weight of two-month-old baby girls. Round the answers to three decimal places....
A Gallup poll asked a sample of Canadian adults if they thought the law should allow...
A Gallup poll asked a sample of Canadian adults if they thought the law should allow doctors to end the life of a patient who is in great pain and near death if the patient makes a request in writing. The poll included 285 people in Quebec, 207 of whom agreed that doctor-assisted suicide should be allowed. (a) What is the margin of error of the large-sample 99.5% confidence interval for the proportion of all Quebec adults who would allow...
Question 15 of 30 (1 point) View problem in a pop-up 7.3 Section Exercise 27 Call...
Question 15 of 30 (1 point) View problem in a pop-up 7.3 Section Exercise 27 Call me: A sociologist wants to construct a 98% confidence interval for the proportion of children aged 8-10 living in New York who own a cell phone Part 1 out of 3 A survey by the National Consumers League taken in 2012 estimated the nationwide proportion to be 0.28. Using this estimate, what sample size is needed so that the confidence interval will have a...
please answer both:) 2. In a recent survey, we are 95% confident the population percentage of...
please answer both:)
2. In a recent survey, we are 95% confident the population percentage of all adults that believe in UFO's is between 18.25% and 20.75%. a. Determine the Best point Estimate. b. Determine the Margin of Error. 3. In a March 2010 poll of 1600 American adults, 1088 described themselves as "totally happy" (this category included both very happy" or "somewhat happy” responses) Use STATCRUNCH to construct a 95% confidence interval for the proportion of American adults who...
In May 2006, the Gallup Poll (www.galluppoll.com) asked 510 randomly sampled adults the question "Generally speaking, do...
In May 2006, the Gallup Poll (www.galluppoll.com) asked 510 randomly sampled adults the question "Generally speaking, do you believe the death penalty is applied fairly or unfairly in this country today?" Of these, 60% answered "Fairly," 35% said "Unfairly," and 4% said they didn't know. First, please answer this question: From this survey, what can we conclude about the opinions of all adults? (To answer this question, please build a 95% confidence interval for the proportion of all U.S. adults...
Question 1 of 13 (1 point) Attempt 1 of Unlimited View question in a popup 8.1...
Question 1 of 13 (1 point) Attempt 1 of Unlimited View question in a popup 8.1 Section Exercise A sample of size n=74 is drawn from a normal population whose standard deviation is o=7.2. The sample mean is x =43.56. Part 1 of 2 (a) Construct a 99.8% confidence interval for u. Round the answer to at least two decimal places. A 99.8% confidence interval for the mean is <u< . Part 2 of 2 (b) If the population were...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
7.1 Section Exercise Question 3 of 18 (1 point) Altempt 3 of Unlimited View questlon in a popup 7 A sample of size n 87 is drawn from a population whose standard deviation is a Part 1 of 2 (a) Find the margin of error for a 90% confidence interval for . Round the answer to at least three decimal places. The margin of error for a 90% confidence interval for u is Part 2 of 2 (b) If the...
1) According to the national center on health statistics (2004), 22.4% of adults are smokers. A random sample of 100 adults is obtained. State the criteria for normality and determine if it has been met in this case. (2pts) by Find the mean and standard error for the sampling distribution of sample proportions (2pts) In a random sample of 100 adults, what is the probability that at most 15 of them are smokers? (4pts) What is the probability of getting...
Question 3 of 26 (3 points) Attempt 1 of Unlimited View question in a popup 8.2 Section EX Baby weight: Following are weights, in pounds, of 10 two-month-old baby girls. It is reasonable to assume that the population is approximately normal. 12.23 12.32 14.13 9.34 11.48 8.63 12.66 10.30 12.34 12.95 Send data to Excel Part: 0/2 Part 1 of 2 Construct an 80% interval for the mean weight of two-month-old baby girls. Round the answers to three decimal places....
Question 15 of 30 (1 point) View problem in a pop-up 7.3 Section Exercise 27 Call me: A sociologist wants to construct a 98% confidence interval for the proportion of children aged 8-10 living in New York who own a cell phone Part 1 out of 3 A survey by the National Consumers League taken in 2012 estimated the nationwide proportion to be 0.28. Using this estimate, what sample size is needed so that the confidence interval will have a...
please answer both:)
2. In a recent survey, we are 95% confident the population percentage of all adults that believe in UFO's is between 18.25% and 20.75%. a. Determine the Best point Estimate. b. Determine the Margin of Error. 3. In a March 2010 poll of 1600 American adults, 1088 described themselves as "totally happy" (this category included both very happy" or "somewhat happy” responses) Use STATCRUNCH to construct a 95% confidence interval for the proportion of American adults who...
Question 1 of 13 (1 point) Attempt 1 of Unlimited View question in a popup 8.1 Section Exercise A sample of size n=74 is drawn from a normal population whose standard deviation is o=7.2. The sample mean is x =43.56. Part 1 of 2 (a) Construct a 99.8% confidence interval for u. Round the answer to at least two decimal places. A 99.8% confidence interval for the mean is <u< . Part 2 of 2 (b) If the population were...
Most questions answered within 3 hours.
-
A 0.0510 M solution of an organic acid has an
[H+] of 7.50×10-4M .
What is...
asked 15 seconds from now -
The completed Lewis structure of CO2 contains a total
of 0,1,2,3,4,5,6,7,8 covalent bonds
and 0,1,2,3,4,5,6,7,8 lone pairs.
NOTE:...
asked 2 minutes ago -
what is the profit-maximizing output condition that a
monopolistically competitive firm must satisfy? a) price charged...
asked 4 minutes ago -
Consider the set of ordered pairs shown below. Assuming that the
regression equation is y=3.513+0.429x and...
asked 25 minutes ago -
1. (A) Write two
structural (constitutional)
isomers of C4H8F2?
Please show all of
the
asked 28 minutes ago -
Objective: Practice converting a Boolean logic
expression into it’s truth table and to show the implementation...
asked 24 minutes ago -
1) Name the three holes located in the greater wing of the
sphenoid bone in order...
asked 28 minutes ago -
For the following reaction set-up, which type of hydrocarbon
product would form? 1,4-hexadiene + two Cl2...
asked 31 minutes ago -
Consider the following method that is intended to determine if
the double values d1 and d2...
asked 43 minutes ago -
could someone please post clear drawings of the three structures
in the equilibrium mixture of D-glucose...
asked 50 minutes ago -
Using the Properties of Order show that 5n5 +
4n4 + 6n3 + 2n2+ n +...
asked 53 minutes ago -
What is experiential learning and how is it helpful for teaching
leadership, and interpreting group dynamics?...
asked 53 minutes ago