QUESTION 9 According to a web security firm, 65% of email messages received are spam. Suppose your inbox contains 15 new messages, what in the probablity that at least 12 of them are spam? O 0.111 O 0.0017 0.1727 0.9383
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A: Answer : P(d<3)= P(d = 1,2) =0.301 + 0.176= 0.477
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A: Response bias occurs when responders purposefully give inaccurate answers.
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Q: Suppose that 100 fair dice are tossed. Let ?? be the number showing on the ??ℎ die. What is the…
A: 100 fair dice are tossed.Let denote the number showing on the die.
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- In a recent study, 20 males used a new weight-loss supplement, and all but 4 of them experienced weight loss after two weeks. In the same study, 100 females used the same supplement, and all but 13 of them experienced weight loss after two weeks. Fill in the blanks of the statement below to make the statement the most reasonable possible. The new weight-loss supplement was less effective on ? in the study because ? % of them failed to lose weight after two weeks, whereas only ? % of the ? failed to lose weight after two weeks.A study was conducted to determine whether a woman's risk of transmitting HIV to her unborn child is different for the younger vs. the older the child. A sample of 100 HIV- infected women who gave birth to two children found that, when only one of the two siblings had HIV, it occurred in 7 of the 100 older siblings and in 15 of the younger siblings, as shown in the table below. Younger sibling HIV? Yes No Yes 7 Older sibling HIV? No 15 76 (a) We are not interested in the case when both siblings are HIV positive or the case when both are not HIV positive. We are only interested in the two cases in which one sibling is HIV positive and the other is not (the 7 and 15). Test Ho: the probability of being HIV positive is the same for older siblings as it is for younger siblings along with the alternative HA: the probabilities are different. Use a = .10. (b) Test the hypothesis if HA is directional, that the younger sibling (15 in the table) is more likely than the older sibling to have HIV.…Which of the following do you think could possibly be true statistically? A) A teacher brought 40 calculators to class, and 20% of them had dead batteries B) None of the other statements could be true C)The number of violent crimes in the city decreased by 112.46% last year D)Last year, 60 of the 80 residents in a neighborhood subscribed to the local newspaper, and this year, it is 40 residents who subscribe. This is a 50% decrease E) A company's annual profits increased by 110% over the last decade
- In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 XQuestion 10 It's hot out there! You made a batch of 24 frozen ice pops and would like to select a group of 3 to test for quality control. How many possible groups of 3 could you select? Group of answer choices 2,090 2,024 506 12,144 Question 11 You are at Walmart buying pool noodles for the summer. You are selecting 5 pool noodles from a bin that contains 9 green noodles, 16 red noodles, 20 blue noodles, and 17 yellow noodles. What is the probability that you select 2 yellow, 1 blue, and 2 red pool noodles? Round your answer to 5 decimal places. Group of answer choices 0.00191 0.00034 0.00168 0.00219 Question 12 The following data represents the popularity of meat pizza toppings during lunch and dinner: What is the probability that a randomly selected customer orders pepperoni? Round your answer to 4 decimal places. Group of answer choices 0.7077 0.6692 0.4643 0.2759 Question 13 The following data represents the popularity of meat pizza toppings…20. 3 Venn diagram
- Suppose that in a certain large population, the proportion of people that have blood type O is 0.33. If 7 people are randomly and independently selected from this population, what is the probability that no more than one has blood type O? (Give your response to at least 3 decimal places. Give only your numeric response, and not any extra characters or symbols.) Your Answer:4A researcher uses an anonymous survey to investigate the study habits of American college students. The entire group of American college students is an example of a(n)
- 23 see pictureCan someone please explain it to me ASAP??!!Sixteen men and fourteen women in an Introductory Psychology class have taken their midterm exams. Their scores are listed here. (For gender, 1 = male and 2 = female). Student Gender Score Student Gender Score 1 1 85 16 2 89 2 1 53 17 2 73 3 2 92 18 2 91 4 1 70 19 1 76 5 1 76 20 1 75 6 1 93 21 2 89 7 1 90 22 2 71 8 2…
