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- How many different signals can be sent, when three flags are used, if two of the 9 flags are missing?Of the total 161 patients with diabetes ketoacidosis (DKA), 13 had DKA before and after the pump therapy, 128 did not have DKA either before or after, 7 had DKA before but not after, and 13 did not have DKA before but after.a) Draw a 2 by 2 table b) Is there any evidence of a difference in the effect? c) Write a brief summary of what the result show.A life insurer classifies insurance applicants according to gender (i.e male or female ) and smoking habits (smoker or non smoker). The result for a large group of applicants are: 1) 75% of male 2) 75% of non-smokers 3) 5% are female smokers. What percentage are male non-smokers
- A college finds that 12% of students have taken a distance learning class, 24% of students arepart-time students, and of the part-time students, 25% have taken a distance learning class.(a) What percentage of students are both part-time and have taken a distance learning class?(b) What percentage of the students who have taken a distance learning class are part-time?A researcher wished to find out whether the perceptions of a persons height depends on that person’s perceived status. A random sample of army inductees was selected and equally divided into four groups. An actor gave a short address to each group separately, extollng the joys of army life. For the first group, the actor was dressed as a private; for the second, as a sergeant; for the third, as a captain, and, finally, for the fourth grup, as a Colonel. The inductees were asked to fill out a questionnaire evaluating the speech. Among the questions was one asking for an estimate of the lecturer’s height.In a recent year, the most popular colors for light trucks were white, 30%; black, 17%; red, 14%; silver,12%; gray, 11%; blue, 8%; and other, 8%. A survey of light truck owners in a particular area revealed the following: White Black Red Silver Gray Blue Other 45 32 30 30 22 15 6 a=0.05, do the proportions differ from those stated?
- The cancer treatment facts and figures show that for early-stage lung cancer 71% of all patients undergo surgery and 37% of all patients receive radiotherapy as part of their treatments. Furthermore, 53% of all early-stage lung cancer patients ONLY receive surgery. What percentage of early-stage lung caner patients undergo both surgery and radiotherapy?According to FBI data, 12% of burglaries. What should we conclude if the detective clears all five burglaries with arrests.Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a recent poll of 300 adults with children find that 143 indicated that they spank their children. Assuming parents attitudes toward spanking has not changed since the original poll how many of the 300 parents surveyed would be expected to spank their children.
- A nationwide survey of 1000 adults found that 50% of respondents favored a plan to break up the 12 megabanks, which then controlled about 69% of the banking industry. Complete parts (a) and (b) below. a. Identify the population and sample for this study. Choose the correct answer below. A. The population is all adults in the country who favored breaking up the megabanks. The sample is the 1000 adults surveyed. B. The population is the 1000 adults surveyed. The sample is those adults who favored breaking up the megabanks. C. The population is all adults in the country. The sample is those adults who favored breaking up the megabanks. D. The population is all adults in the country. The sample is the 1000 adults surveyed. Part 2 b. Is the percentage provided a descriptive statistic or an inferential statistic? Explain your answer. A. The percentage is a descriptive statistic, since it summarizes information about how much of the…For a telephone survey, a marketing research group needs to contact at least 600 wives, 480 husbands, 400 single adult males, and 440 single adult females. It costs $3 to make a daytime call and (because of higher labor costs) $5 to make an evening call. The file P03_31.xlsx lists the results that can be expected. For example, 30% of all daytime calls are answered by a wife, 15% of all evening calls are answered by a single male, and 40% of all daytime calls are not answered at all. Due to limited staff, at most 40% of all phone calls can be evening calls. a. Determine how to minimize the cost of completing the survey. b. Use SolverTable to investigate changes in the unit cost of either type of call. Specifically, investigate changes in the cost of a daytime call, with the cost of an evening call fixed, to see when (if ever) only daytime calls or only evening calls will be made. Then repeat the analysis by changing the cost of an evening call and keeping the cost of a daytime call…Some people seem to believe that you can fix anything with duct tape. Even so, many were skeptical when researchers announced that duct tape may be a more effective and less painful alternative than liquid nitrogen, which doctors routinely use to freeze warts. An article described a study conducted at a medical center. Patients with warts were randomly assigned to either the duct tape treatment or the more traditional freezing treatment. Those in the duct tape group wore duct tape over the wart for 6 days, then removed the tape, soaked the area in water, and used an emery board to scrape the area. This process was repeated for a maximum of 2 months or until the wart was gone. Data consistent with values in the article are summarized in the following table. Treatment n Number with WartSuccessfully Removed Liquid nitrogen freezing 103 60 Duct Tape 101 88 Do these data suggest that freezing is less successful than duct tape in removing warts? Test the relevant hypotheses using…
