Homework Answers
Solution:- Given X = 384 , n = 525
p = X/n = 384/525 = 0.731
q = 1 - p = 1 - p = 1-0.73 = 0.269
90% confidence interval for the Z = 1.645
90% confidence interval for p = p +/- Z*sqrt(pq/n)
= 0.731 +/- 1.645*sqrt(0.731*0.269/525)
= 0.699 ,
0.763
Add Answer to:
Confidence Intervals for Means and Proportions: Problem 9 Previous Problem List Next (1 point) A poll...
Week 10b - Ch23 Comparing Two Proportions: Problem 6 Previous Problem List Next (1 point) (a)...
Week 10b - Ch23 Comparing Two Proportions: Problem 6 Previous Problem List Next (1 point) (a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume the 'worst case scenario for the value of both sample proportions. We want a 98% confidence level and for the error to be smaller than 0.07. Answer:...
Module 6: Problem 4 Previous Problem Problem List Next Problem (1 point) The USC Annenberg School...
Module 6: Problem 4 Previous Problem Problem List Next Problem (1 point) The USC Annenberg School Center for the Digital Future found that, in 2009, 30% of Americans folt uncomfortable with the lack of face-to-face contact when ordering a product online. The corresponding percentage was 23.2% in 2001. Assume the samples were independently and randomly selected and that the sample size was 2000 in both years. Find a 99% confidence interval for the difference in population proportions of those uncomfortable...
HW03 linear systems: Problem 6 Previous Problem Problem List Next Problem 1 point) Solve the system...
HW03 linear systems: Problem 6 Previous Problem Problem List Next Problem 1 point) Solve the system y-11 714y35 If there is no solution, enter NONE in both answer blanks. Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor
(1 point) A poll is taken in which 313 out of 550 randomly selected voters indicated...
(1 point) A poll is taken in which 313 out of 550 randomly selected voters indicated their preference for a certain candidate. (a) Find a 95% confidence interval for p. sps (b) Find the margin of error for this 95% confidence interval for p (c) Without doing any calculations, indicate whether the margin of error is larger or smaller or the same for an 80% confidence interval. A. larger B. smaller C. same Note: You can earn partial credit on...
Assignment4: Problem 16 Previous Problem Problem List Next Problem (1 point) The sequence {an) is given...
Assignment4: Problem 16 Previous Problem Problem List Next Problem (1 point) The sequence {an) is given by an = 9 00 Σας (enter "diverges" if the sum diverges.) The sequence {b.) is given by bn = 9 = (enter "diverges" if the sum diverges.) RO Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor
Previous Problem List Next (1 point) Two random samples are taken, one from among UVA students...
Previous Problem List Next (1 point) Two random samples are taken, one from among UVA students and the other from among UNC students. Both groups are asked if academics are their top priority. A summary of the sample sizes and proportions of each group answering yes" are given below: UVA (Pop. 1): n = 86, pi = 0.7 UNC (Pop. 2): n2 = 92, p2 = 0.588 Find a 97.6% confidence interval for the difference p1 - P2 of the...
incorrect Lecture18: Problem 9 Previous Problem List Next (1 point) If 450 confidence intervals, each having a 97% l...
incorrect
Lecture18: Problem 9 Previous Problem List Next (1 point) If 450 confidence intervals, each having a 97% level of confidence, were computed for a population meanu, about how many of the intervals can be expected to contain u? 436.5 (Your answer will be an integer, of course.) Note: You can get a new version of this problem after the due date. Preview My Answers Submit Answers You have attempted this problem 1 time. Your overall recorded score is 0%....
Previous Problem Problem List Next Problem (1 point) zeSy + Уз cos(92)-e7z implicitly defines y as a function of z...
Previous Problem Problem List Next Problem (1 point) zeSy + Уз cos(92)-e7z implicitly defines y as a function of z then lf dy da Preview My AnswersSubmit Answers You have attempted this problem 0 times. You have 5 attempts remaining Previous Problem Problem List Next Problem (1 point) 80 23 0 has an inverse function f (x), then Assuming the function() a2 +9 (f-1),(8)- f 1(8) 田 and Note: You can earn partial credit on this problem. You have attempted...
Chapter 5: Problem 7 Previous Problem Problem List Next Problem t poin Find the orthogonal projec...
Chapter 5: Problem 7 Previous Problem Problem List Next Problem t poin Find the orthogonal projection ofi ttbspace W spaned by projw)- Preview My AnswersSubmit Answers You have attempted this probiem 0 times. You have unilimited attempts remaining. Email instructor Page generated at 04/152019 at 10:45pm MST WeawK 0 1996-2017ners math4 İ ww-version: waWorK-2 13 | pg.venon 2. 12 The Weevurk Project
Chapter 5: Problem 7 Previous Problem Problem List Next Problem t poin Find the orthogonal projection ofi ttbspace...
Module 5: Problem 13 Previous Problem Problem List Next Problem 15 (1 point) A page was...
Module 5: Problem 13 Previous Problem Problem List Next Problem 15 (1 point) A page was randomly selected from each of 7 brochures for cancer patients published by the American Cancer Society and the National Cancer Institute. The pages were judged for readability, using standard readability tests. The reading grade levels are given below. Grade levels: 7, 11, 12, 6, 11, 13, 16 Construct a 99% confidence interval for the population mean readability level. Note: You can earn partial credit...
Week 10b - Ch23 Comparing Two Proportions: Problem 6 Previous Problem List Next (1 point) (a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume the 'worst case scenario for the value of both sample proportions. We want a 98% confidence level and for the error to be smaller than 0.07. Answer:...
Module 6: Problem 4 Previous Problem Problem List Next Problem (1 point) The USC Annenberg School Center for the Digital Future found that, in 2009, 30% of Americans folt uncomfortable with the lack of face-to-face contact when ordering a product online. The corresponding percentage was 23.2% in 2001. Assume the samples were independently and randomly selected and that the sample size was 2000 in both years. Find a 99% confidence interval for the difference in population proportions of those uncomfortable...
HW03 linear systems: Problem 6 Previous Problem Problem List Next Problem 1 point) Solve the system y-11 714y35 If there is no solution, enter NONE in both answer blanks. Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor
(1 point) A poll is taken in which 313 out of 550 randomly selected voters indicated their preference for a certain candidate. (a) Find a 95% confidence interval for p. sps (b) Find the margin of error for this 95% confidence interval for p (c) Without doing any calculations, indicate whether the margin of error is larger or smaller or the same for an 80% confidence interval. A. larger B. smaller C. same Note: You can earn partial credit on...
Assignment4: Problem 16 Previous Problem Problem List Next Problem (1 point) The sequence {an) is given by an = 9 00 Σας (enter "diverges" if the sum diverges.) The sequence {b.) is given by bn = 9 = (enter "diverges" if the sum diverges.) RO Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor
Previous Problem List Next (1 point) Two random samples are taken, one from among UVA students and the other from among UNC students. Both groups are asked if academics are their top priority. A summary of the sample sizes and proportions of each group answering yes" are given below: UVA (Pop. 1): n = 86, pi = 0.7 UNC (Pop. 2): n2 = 92, p2 = 0.588 Find a 97.6% confidence interval for the difference p1 - P2 of the...
incorrect
Lecture18: Problem 9 Previous Problem List Next (1 point) If 450 confidence intervals, each having a 97% level of confidence, were computed for a population meanu, about how many of the intervals can be expected to contain u? 436.5 (Your answer will be an integer, of course.) Note: You can get a new version of this problem after the due date. Preview My Answers Submit Answers You have attempted this problem 1 time. Your overall recorded score is 0%....
Previous Problem Problem List Next Problem (1 point) zeSy + Уз cos(92)-e7z implicitly defines y as a function of z then lf dy da Preview My AnswersSubmit Answers You have attempted this problem 0 times. You have 5 attempts remaining Previous Problem Problem List Next Problem (1 point) 80 23 0 has an inverse function f (x), then Assuming the function() a2 +9 (f-1),(8)- f 1(8) 田 and Note: You can earn partial credit on this problem. You have attempted...
Chapter 5: Problem 7 Previous Problem Problem List Next Problem t poin Find the orthogonal projection ofi ttbspace W spaned by projw)- Preview My AnswersSubmit Answers You have attempted this probiem 0 times. You have unilimited attempts remaining. Email instructor Page generated at 04/152019 at 10:45pm MST WeawK 0 1996-2017ners math4 İ ww-version: waWorK-2 13 | pg.venon 2. 12 The Weevurk Project
Chapter 5: Problem 7 Previous Problem Problem List Next Problem t poin Find the orthogonal projection ofi ttbspace...
Module 5: Problem 13 Previous Problem Problem List Next Problem 15 (1 point) A page was randomly selected from each of 7 brochures for cancer patients published by the American Cancer Society and the National Cancer Institute. The pages were judged for readability, using standard readability tests. The reading grade levels are given below. Grade levels: 7, 11, 12, 6, 11, 13, 16 Construct a 99% confidence interval for the population mean readability level. Note: You can earn partial credit...
Most questions answered within 3 hours.
-
A coach uses a new technique to train gymnasts. Seven
gymnasts were randomly selected and their...
asked 7 minutes ago -
While rotating the tires on your car you notice a rock [mass =
0.1 Kg] stuck...
asked 2 hours ago -
Using MARS simulator, write MIPS programs according to
the following scenarios: Receive a positive integer number...
asked 3 hours ago -
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 4 hours ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 5 hours ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 6 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 6 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 6 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 6 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 6 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 6 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 6 hours ago