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5.1.5 Assigned Media 7 Question Help 7 :5 Determine whether the value is a discrete random variable, continuous random variable, or not a random variable. a. The number of people with blood type A in a random sample of 50 people b. The time it takes for a light bulb to burn out c. The response to the survey question "Did you smoke in the last week?" d. The number of points scored dun'ng a basketball game e. The exact time it takes to evaluate 2? + ?2 f. The number of people in a restaurant that has a capacity of 300 a. Is the number of people with blood type A in a random sample of 50 people a discrete random variable, a continuous random variable, or not a random variable? 0 A. It is a continuous random van'able. O B. It is a discrete random variable. 0 C. It is not a random variable. 5.3.14-T Question Help? it A rare faint of malignant tumor occurs in 11 children in a million, so its probability is 0.111100 11. Four cases of this tumor occurred in a certain town, which had 13,280 children. a. Assuming that this tumor occurs as usual, nd the mean number of cases in groups of 13,281] children. b. Using the unrounded mean from part {a}, nd the probability that the number of tumor cases in a group 0118.231] children is [I or 1. c. What is the probability of more than one case? d. Does the cluster of four cases appearto be attributable to random chance? Why or why not? a. The mean number of cases is (Type an integer or decimal rounded to three decimal places as needed.) 5.1.11 Assigned Media Question Help A sociologist randomly selects single adults for different groups of three, X P(x) and the random variable x is the number in the group who say that the 0 0.091 most fun way to flirt is in person. Determine whether a probability 0.348 distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the 2 0.402 requirements that are not satisfied. 3 0.159 Does the table show a probability distribution? Select all that apply. A. Yes, the table shows a probability distribution. OB. No, the random variable x's number values are not associated with probabilities. C. No, not every probability is between 0 and 1 inclusive. OD. No, the random variable x is categorical instead of numerical. O E. No, the sum of all the probabilities is not equal to 1.5.1.16 Assigned Media Question Help The accompanying table describes results from groups of 10 births from 10 different sets of parents. The random variable x represents the number of girls among 10 children. Use the range rule of thumb to determine whether 1 girl in 10 births is a significantly low number of girls Click the icon to view the table. i Probability Distribution for x Use the range rule of thumb to identify a range of values that are not significant. The maximum value in this range is girls. (Round to one decimal place as needed.) Number of Girls x P(x) 0 0.002 0.017 0.037 0.114 0.197 0.235 0. 195 0.113 0.043 LO 0.017 10 0.0305.1.20 Assigned Media Question Help The accompanying table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Complete parts (a) through (d) below. i Probability Distribution for x X Click the icon to view the table. a. Find the probability of getting exactly 1 girl in 8 births. Number of (Type an integer or a decimal. Do not round.) Girls x P(x) 0 0.004 0.007 W N - 0.114 0.201 0.348 0.201 0.114 0.007 0.0045.1.21 Assigned Media 7 Question Help 7 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 live. a Click the icon to View the data table. 0 Table of numbers of Sleepwalkers and probabilities The mean is sleepwalkeris}. [Round to one decimal place as needed.) PM e mm 0.351 0.304 0.13? 0.026 0.002 IridiumID\" 5.2.21-T Assigned Media Question Help Assume that when adults with smartphones are randomly selected, 62% use them in meetings or classes. If 9 adult smartphone users are randomly selected, find the probability that exactly 7 of them use their smartphones in meetings or classes. The probability is. (Round to four decimal places as needed.)5.2.32 Assigned Media Question Help Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 10. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of peas with green pods in the groups of 10. The value of the mean is u = peas. (Type an integer or a decimal. Do not round.)5.2.36-T Assigned Media Question Help When purchasing bulk orders of batteries, a toy manufacturer uses this acceptance sampling plan: Randomly select and test 41 batteries and determine whether each is within specifications. The entire shipment is accepted if at most 3 batteries do not meet specifications. A shipment contains 3000 batteries, and 2% of them do not meet specifications. What is the probability that this whole shipment will be accepted? Will almost all such shipments be accepted, or will many be rejected? The probability that this whole shipment will be accepted is (Round to four decimal places as needed.)5.2.41 Assigned Media 7 Question Help Y {1' If a procedure meets all of the conditions of a binomial distribution except the number of trials is not xed, then the geometric distribution can be used. The probability of getting the rst success on the )rth trial is given by P(x}= p(1 pi)\" 1, where p is the probability of success on any one trial. Subjects are randomly selected for a health survey. The probability that someone is a universal donor (with group O and type Rh negative blood} is [1.04. Find the probability that the rst subject to be a universal blood donor is the sixth person selected. The probability is . (Round to tour decimal places as needed.)