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Homework: Online Assignment #7 Discrete distributions and Bi Score: 0 of 1 pt 4 7 of 40 (35 complete) 7 p Hw Score: 73.45%, 29.38 of 40 pts 5.1.21 Question Help V '0 Refer to the accompanying table, which describes the number of adults in groups of ve who reported sleepwalking. Find the mean and standard deviation for the numbers of sleepwalkers in groups of ve. g Click the icon to View the data table. The mean is D sleepwalker(s). (Round to one decimal place as needed.) Homework: Online Assignment #7 Discrete distributions and Bi Score: Oof1 pt 4 b HW Score: 73.45%, 29.38 of 40 pts 5.2.1 7-T Question Help V a Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are n = 9 trials, each with probability of success (correct) given by p = 0.45. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(X HW Score: 72.22%, 13 of 18 pts 6.2.31 Question Help V a The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 days or longer. b. If the length of pregnancy is in the lowest 3%, then the baby is premature. Find the length that separates premature babies from those who are not premature. Homework: Online Assignment # 4A Normal /Continuous distribu- Score: 0 of 1 pt 4 22 of 31 (29 complete) 7 ) HW Score: 72.1%, 22.35 of 31 pts *6.3.17 Question Help V 0 Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation 20. Find P9, which is the IQ score separating the bottom 9% from the top 91%. Click to view p_age 1 of the table. Click to View p_age 2 ofthe table. The IQ score that separates the bottom 9% from the top 91% is P9 = :|. (Round to the nearest hundredth as needed.) Homework: Online Assignment #3 (chapter 3) Score: 0 of 1 pt { 23 of 40 (32 complete) V ) HW Score: 69.29%, 27.72 of 40 pts 3.2.44 Question Help V a According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.34F and a standard deviation of 0.59F. Using Chebyshev's theorem, what do we know about the percentage of healthy adults with body temperatures that are within 3 standard deviations of the mean? What are the minimum and maximum possible body temperatures that are within 3 standard deviations of the mean? At least I:% of healthy adults have body temperatures within 3 standard deviations of 98.34F. (Round to the nearest percent as needed.) Homework: Online Assignment #3 (chapter 3) Save Score: 0 of 1 pt 33 of 40 (32 complete) HW Score: 69.29%, 27.72 of 40 pts 3.3.21 Question Help Use the following cell phone airport data speeds (Mbps) from a particular network. Find P70. 0. 1 0.2 0.2 0.3 0.3 0.6 0.4 0.6 0.4 0.7 0.5 0.7 0.6 0.8 0.6 1.4 0.8 1.6 0.8 1.8 0.8 1.9 2.3 1.1 1.2 3.5 2.6 4.4 2.6 4.6 2.8 5.4 6.5 2.9 3.4 11.1 6.5 11.3 7.5 12.4 8.4 13.3 9.1 13.8 14.6 9.1 15.2 15.7 15.8 25.7 P70 = Mops (Type an integer or a decimal. Do not round.)
