This is statistics course and I need help with answering those questions. If you don't have much time to provide solutions, that's fine but I need correct answers asap. Thank you
D Question 34 1 pts A survey is conducted at a local high school to determine the effectiveness of school communication with students' families who speak a language other than English at home. To collect data, the school's statistician plans to send a questionnaire home with students to ask for the parent's opinion about the school's communication effectiveness. Which of the following sources of bias is apparent in this survey, and what is the best way to reduce bias? O Wording effect bias; parents should be given the opportunity to rate communication on a scale. Non random sampling; questionnaires should only be sent home with a random sample of students. Undercoverage bias; a native speaker of the family's home language should conduct the survey by phone. Nonresponse bias; questionnaires should be mailed to the parent's address rather than sent home with students. O Sampling error; parents are likely to have varying opinions, so some bias is normal and expected.D Question 36 1 pts Suppose that the distribution of weights of high school males is approximately Normal, with a mean of 165 pounds and a standard deviation of 35 pounds. If you randomly select a high school male, what is the probability that they will weigh more than 200 pounds? O 0.1587 O 0.3144 0.5000 O 0.8413 1.0000O 1.0000 D Question 37 1 pts The mean composite ACT score is a 21, with a standard deviation of 5.2. The mean composite SAT score is a 1490, with a standard deviation of 84. Mike scores a 1530 on the SAT and a 24 on the ACT. If Mike can only send one of his test results to the college of his choice, which of the following methods could be used to determine which score is the more competitive? 1. Percentiles I1. Residuals Ill. Z-scores O I only O I and II only O I and Ill only O ll and Ill only O I, II, and IllD Question 38 1 pts The distribution of t-shirt sizes in a box is as follows. Size S M L XL XXL Proportion 0.2 0.4 0.2 0.1 0.1 If two t-shirts are randomly drawn from the box with replacement, what is the probability that they are the same size? O 0.04 O 0.24 O 0.26 O 0.74 O 0.76D Question 39 1 pts Not considering births to more than one child, babies born at a particular hospital are independent events, with the probability that a baby is a boy is 0.49, and the probability that a baby is a girl is 0.51 percent. What is the probability that the next three babies born at the hospital are of the same sex? O 0.1327 O 0.2503 O 0.2499 O 0.0156 O 0.1177 10D Question 40 1 pts A summer training camp is held for high school football players of all positions. A random sample of 40 running backs attending the camp is selected. Among those selected, 15 percent have suffered at least one concussion. For which of the following populations is 15 percent a reasonable estimate of the percentage who have suffered a concussion? All high school football players All high school running backs All high school running backs who have suffered a concussion All high school football players who attended the camp O All high school running backs who attended the campD Question 41 1 pts Eight friends decide to put together a flag football team in order to participate in their intramural league this summer. Based on past experiences with each of these friends, you have created a probability distribution of the number of friends who will actually show up to a game, where X is the number of friends who attend, and displayed the results below. X 2 3 5 6 17 8 P(X) 0.05 0.07 0.02 0.06 0.04 0.10 0.23 0.33 0.10 Suppose that each team in flag football must field a minimum of five players before they forfeit a game. What is the probability that your friends will have enough players to play? O 0.17 O 0.24 O 0.27 0.66 O 0.76
