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Week 10b - Ch23 Comparing Two Proportions: Problem 6 Previous Problem List Next (1 point) (a)...
webwork/math243spring-mcginnis / week_10b_-_ch23_comparing_two_proportions / 3 Week 10b - Ch23 Comparing Two Proportions: Problem 3 Previous Problem...
webwork/math243spring-mcginnis / week_10b_-_ch23_comparing_two_proportions / 3 Week 10b - Ch23 Comparing Two Proportions: Problem 3 Previous Problem List Next (1 point) Independent random samples, each containing 70 observations, were selected from two populations. The samples from populations 1 and 2 produced 48 and 36 successes, respectively. Test Ho: P1-P) = 0 against H.: 01-P). Use a = 0.08. (a) The test statistics ems b) The P-value is (c) The final conclusion is A. We can reject the pull hypothesis that (1-P)...
(1 point) Find the size of the sample needed to estimate the difference between the proportions...
(1 point) Find the size of the sample needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume that we want 99% confidence that the error is smaller than 0.07. n=
Section 10.7: Problem 19 Previous Problem Problem List Next Problem (1 point) Find a parametrizat...
Section 10.7: Problem 19 Previous Problem Problem List Next Problem (1 point) Find a parametrization, using cos(t) and sin(t), of the following curve The intersection of the plane y 6 with the sphere z2 +y2 + z2100 Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor Page generated at 03/24/2019 at 11:56am MST WeBWorK 1996-20171 theme: math4 I ww version: WeBWork-2.13 l pg._version 2.121 The WeBWorK Project
Section 10.7: Problem...
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...
Confidence Intervals for Means and Proportions: Problem 9 Previous Problem List Next (1 point) A poll...
Confidence Intervals for Means and Proportions: Problem 9 Previous Problem List Next (1 point) A poll is taken in which 384 out of 525 randomly selected voters indicated their preference for a certain candidate Find a 90% confidence interval for p to Note: You can earn partial credit on this problem. Preview My AnswersSubmit Answers You have attempted this problem 0 times. You have 99 attempts remaining Email instructor
Previous Problem Problem List Next Problem (1 point) In 2012, the percentage of cell phone owners...
Previous Problem Problem List Next Problem (1 point) In 2012, the percentage of cell phone owners who used their cell phone to send or receive text messages was 80 %. A polling firm contacted a simple random sample of 1300 people chosen from the population of cell phone owners. If p is the proportion of cell phone owners the mean for p who used their phone to text, then what was 0.011 Submit Answers Preview My Answers You have attempted...
webwork HW 03: Problem 8 Previous Problem List Next (1 point) A company conducted a survey...
webwork HW 03: Problem 8 Previous Problem List Next (1 point) A company conducted a survey of 327 of its employees. Of those surveyed, it was discovered that 127 like baseball, 65 like hockey, and 24 like both baseball and hockey. Let B denote the set of employees which like baseball and H the set of employees which like hockey. How many employees are there in the set BUH? How many employees are in the set (B n H)? Note:...
(1 point) The sample size needed to estimate the difference between two population proportions to within...
(1 point) The sample size needed to estimate the difference between two population proportions to within a margin of error E with a significance level of α can be found as follows. In the expression E=z∗p1(1−p1)n1+p2(1−p2)n2‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾√ we replace both n1 and n2 by n (assuming that both samples have the same size) and replace each of p1, and p2, by 0.5 (because their values are not known). Then we solve for n, and get n=(z∗)22E2. Finally, increase the value of...
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...
Ocा । Previous Problem Problem List Next Problem (1 point) Find the function satisfying the differential...
Ocा । Previous Problem Problem List Next Problem (1 point) Find the function satisfying the differential equation y' - 3y=9e6e and y(0) = -6. y = Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. WORP Page generated at 04/19/2020 at 07:47pm PDT 1996-2017 theme: math4 ww_version: We Work 2.13 g version PG-13 The W WebWork
webwork/math243spring-mcginnis / week_10b_-_ch23_comparing_two_proportions / 3 Week 10b - Ch23 Comparing Two Proportions: Problem 3 Previous Problem List Next (1 point) Independent random samples, each containing 70 observations, were selected from two populations. The samples from populations 1 and 2 produced 48 and 36 successes, respectively. Test Ho: P1-P) = 0 against H.: 01-P). Use a = 0.08. (a) The test statistics ems b) The P-value is (c) The final conclusion is A. We can reject the pull hypothesis that (1-P)...
(1 point) Find the size of the sample needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume that we want 99% confidence that the error is smaller than 0.07. n=
Section 10.7: Problem 19 Previous Problem Problem List Next Problem (1 point) Find a parametrization, using cos(t) and sin(t), of the following curve The intersection of the plane y 6 with the sphere z2 +y2 + z2100 Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor Page generated at 03/24/2019 at 11:56am MST WeBWorK 1996-20171 theme: math4 I ww version: WeBWork-2.13 l pg._version 2.121 The WeBWorK Project
Section 10.7: Problem...
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...
Confidence Intervals for Means and Proportions: Problem 9 Previous Problem List Next (1 point) A poll is taken in which 384 out of 525 randomly selected voters indicated their preference for a certain candidate Find a 90% confidence interval for p to Note: You can earn partial credit on this problem. Preview My AnswersSubmit Answers You have attempted this problem 0 times. You have 99 attempts remaining Email instructor
Previous Problem Problem List Next Problem (1 point) In 2012, the percentage of cell phone owners who used their cell phone to send or receive text messages was 80 %. A polling firm contacted a simple random sample of 1300 people chosen from the population of cell phone owners. If p is the proportion of cell phone owners the mean for p who used their phone to text, then what was 0.011 Submit Answers Preview My Answers You have attempted...
webwork HW 03: Problem 8 Previous Problem List Next (1 point) A company conducted a survey of 327 of its employees. Of those surveyed, it was discovered that 127 like baseball, 65 like hockey, and 24 like both baseball and hockey. Let B denote the set of employees which like baseball and H the set of employees which like hockey. How many employees are there in the set BUH? How many employees are in the set (B n H)? Note:...
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...
Ocा । Previous Problem Problem List Next Problem (1 point) Find the function satisfying the differential equation y' - 3y=9e6e and y(0) = -6. y = Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. WORP Page generated at 04/19/2020 at 07:47pm PDT 1996-2017 theme: math4 ww_version: We Work 2.13 g version PG-13 The W WebWork
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