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- Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector measures 10 spacers and records the following thicknesses: 0.372" 0.376" 0.379" 0.375" 0.370" 0.373" 0.377" 0.378" 0.371" 0.380" Which spacers are defective (above the maximum limit or below the minimum limit)? All dimensions are in inches.Suppose that a customer is purchasing a car. He conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. He conducts this experiment 15 Sample mean for Car 2 x= 245 mi / 10 gal (Type an integer or decimal rounded to one decimal place as needed.) times on each car and records the number of miles driven. Full data set Car 1 Median for Car 1 M= mi / 10 gal (Type an integer or decimal rounded to one decimal place as needed.) 245 242 215 244 220 265 291 160 284 251 169 319 257 306 267 Car 2 Median for Car 2 230 242 M=O mi / 10 gal 206 214 236 256 245 255 241 264 (Type an integer or decimal rounded to one decimal place as needed.) 276 252 250 251 257Gestation For women, pregnancy lasts about 9 months.In other species of animals, the length of time fromconception to birth varies. Is there any evidence thatthe gestation period is related to the animal’s lifespan?The first scatterplot shows Gestation Period (indays) vs. Life Expectancy (in years) for 18 speciesof mammals. The highlighted point at the far rightrepresents humans. a) For these data, r = 0.54, not a very strong relation-ship. Do you think the association would be stronger or weaker if humans were removed?Explain.b) Is there reasonable justification for removing humansfrom the data set? Explain.c) Here are the scatterplot and regression analysis for the17 nonhuman species. Comment on the strength of theassociation.d) Interpret the slope of the line.e) Some species of monkeys have a life expectancy ofabout 20 years. Estimate the expected gestation periodof one of these monkeys.
- Table 3 shows the number of lung cancer deaths per daily number of cigarettes smoked at the time of completing the 1951 questionnaire (only for male physicians who were nonsmokers and current smokers). The number of cigarettes smoked was available for 136 of the people who died of lung cancer. Number of cigarettes Deaths 3 Person-years 42800 0. 1-14 22 38600 15-24 54 38900 +24 57 25100 a) Estimate the appropriate measure of association and 95% confidence interval for each category of number of cigarettes smoked daily, using the group of non-smokers as the reference category. b) What can be inferred about the estimated measure of association in the different categories of number of cigarettes smoked daily? c) What is the proportion of lung cancer deaths among all smokers that can be attributed smoking? What is the proportion of lung cancer deaths in the total population that can be attributed to smoking? consider thatRoman, a health data officer, was tasked to create a report describing the height of all the children ages 12-15 years in a small town in Rome. He measured the height of all the 37 children (ages 12-15 years) in that small town. Answer the table showing the number and percentage of children ages 12 to 15 years according to sex. Sex f Rel f Male <2 decimal places> Female <2 decimal places> Σf <2 decimal places>Suppose the lengths of human pregnancies are normally distributed with u = 266 days and o = 16 days.
- A study has been conducted to compare people of different backgrounds (Australians, Europeans, Asians, Other) and their Body Mass Index (BMI), which is measured on a continuous scale, with larger values representing larger BMIs. Which of the following best describes the level of measurement for BMI Categorical: Nominal Metric: Interval Categorical: Ordinal Metric: RatioAUA wants to determine whether the mean cumulative GPA, CGPA is significantly different among undergraduate and graduate students (Sheet 31). They collect data on several undergraduate and graduate students. What can they conclude at alpha=0.05? Undergraduates Graduates 3,14 3,21 3,25 3,25 2,85 3,66 3,9 3,87 3,84 3,51 3,68 3,25 3,87 3,65 3,58 3,01 3,41 3,06 3,62 2,88 3,88 2,64 3,74 2,57 3,69 2,48 3,95 3,31 3,87 3,22 2,98 3,16 2,58 3,56 3,87 3,45 3,67…In last week's assignment, you calculated mean free path, total absorption, and reverberation time for a room that is 4 m long, 7 m wide, and has a ceiling height of 3 m. The floor is hardwood, = .15 at 500 Hz. The walls are gypsum wallboard (GWB), = .30 at 500 Hz. The ceiling is acoustic ceiling tile (ACT), = .95 at 500 Hz. 2) For a person speaking, what is the critical distance in this room? Use Q = 2.
