math 143 questions , they are all diffrent question I need help and explanation

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Question 11 of 16 {1 point) | Attempt 1 of Unlimited 4.? Compute area Find the area under the standard normal distribution curve to the left of 2 =2. Refer to the table of values °Area Under the Standard Normal Distribution as needed. The area to the left ofz=2 is D.

Question 10 of 16 {1 point) l Attempt 1 of Unlimited 4.? Compute area given z-score(s) Find the area under the standard normal distribution curve to the right of z = 1. Refer to the table of values °Area Under the Standard Normal Distribution as needed. The area to the right of z = 1 is E].

Find the area under the standard normal distribution curve between 2 = 0 and z = -1. Refer to the table of values .Area Under the Standard Normal Distribution as needed. The area between 2:0 and Z: —1 is D.

Question 11 of 11. (1 point) l Attempt 1 of Unlimited 4.8 Portfolio A A stats class was interested in determining the percentage of students on their campus who are opposed to a new policy eliminating all paper books from the campus bookstore in favor of ebooks. After surveying 180 students, the class finds that 32'] are opposed to the policy. The margin of error is 7%. If surveying more students keeps the percentage at 32%, how many more would need to be surveyed in order to be 95% confident that the correct percentage for the entire student body is between 29% and 35%? Don't forget to consider the numbe of students that have already been surveyed. Round up to the nearest student, if necessary. (Hint.- What would the margin of error be in this case?) In order to be 95% confident that the correct percentage for the entire student body is between 29% and 35%, the class needs to survey D more students.

Question 10 of 11 (1 point) | Attempt 1 m Unlimited 4.3 Portfolio Ap A stats class was interested in determining the percentage of students on their campus who are opposed to a new policy eliminating all paper books from the campus bookstore in favor of ebooks. After surveying 178 students, the class finds that 34% are opposed to the policy. The margin of error is 7.1%. If surveying more students keeps the percentage at 34%, how many more would need to be surveyed in order to be 95% confident that the correct percentage for the entire student body is between 31% and 37%? Don't forget to consider the number of students that have already been surveyed. Round up to the nearest student, if necessary. (Hint: What would the margin of error be in this case?) In order to be 95% confident that the correct percentage for the entire student body is between 31% and 37%, the class needs to survey D more students.

Question 9 01 1.1. (1 point) l Attempt 1 of Unlimited 4.8 Portfolio Applicati A stats class was interested in determining the percentage of students on their campus who are opposed to a new policy ' eliminating all paper books from the campus bookstore in favor of eBooks. After surveying 93 students, the class ﬁnds that 34% are opposed to the policy. The margin of error is 9.8%. The class conducting the poll was unhappy with the margin of error (as well they should be}, so they decide to survey another 93 students. With the additional data, the percentage of students opposed to the policy goes up to 36%. What's the margin of error | now? Round to the nearest tenth of a percent. Do not round intermediate steps. 1f the class surveys an additional 93 students and the percent opposed to the policy is found [ to be 36%, the margin of error is D%.

Question 6 of 1.1. (1 point) I Attempt 1 of Unlimited 4.8 Calculate margin of error; One clay,r a poll appeared on a certain website. It asked "Do you believe that rain can soothe the heart and cleanse the mind?'I Unsurprisingly, 35% of 486 answers were "Yes". Calculate the margin of error for this poll. Round the percentage to one decimal place. Do not round intermediate steps. If 486 people were asked that question and 35% of them replied "Yes", the margin of error is E]%.

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