The following data are for the determination of lead in Gasoline: 5.4, 6.8, 6,5, 6.3 and 5.9. What is the true value at 90% confidence level. (t-table at 90% C.L = 2.132). Consider significant figures, O a. 6.2 ± 0.5 O b. 6.2 ± 0.59 O c. 6.1 ± 0.6 O d. 6.14 + 0.59
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- The percentage of an additive in gasoline was measured six times with the following results: 0.13; 0.12; 0.16; 0.17; 0.20 and 0.11%. What is the 99% confidence interval for the additive percentage?6. Using dimensional analysis, show how 0.082057 Latm mol. K Significant figures note: the last digit on both values has been rounded. NOTE: 1 J = 1 N-m = 1 kg.m², and 1 Pa = 1 N m² is equal to 8.3145 or 1 kg m.s mol - KChemistry In an analysis of the content of carbohydrate present in a glycoprotein, the following results were found: 12.6, 11.9, 13.0, 12.7 and 12.5 g of carbohydrate per 100 g of protein. Taking into account that σ is unknown, the confidence interval for the average value at a 90% confidence level of the carbohydrate content is: Select one:to. 12.5 ± 0.4b. 12.5 ± 0.2c. 12.5 ± 0.5d. 12.5 ± 0.3
- For the values 2, 4, 6 thee variance is O2.11 O 1.33 O2.66 O 1.66 2.77 Normality of 0.2 gram of CaCl2 (molecular wt=110) in 100 ml of water is--. O 0.036 O 0.36 O 3.60 O 0.35In a survey of 1000 large corporations, 250 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job (USA Today).(a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p.(b) Find a 0.95 confidence interval for p.(c) As a news writer, how would you report the survey results regarding the proportion of corporations that hire the equally qualified nonsmoker? What is the margin of error based on a 95% confidence interval?For the following data set: 18.3g, 184g 13g 15.0S Determines whether the questionable data is retained or discarded at 95% confidence. Critical Q values a. Reject b. Retain Valores críticos Número de datos 90% 95% 99% 3 0.941 0.970 0.994 0.765 0.829 0.926 0.642 0.710 0.821 5
- 2. As the director of a research laboratory you are paid to decide if there is a significant difference between the mean values of two sets of data obtained by two different scientists, a senior scientist and one recently hired. Use 95% CL. (t at df = 10 is 2.23) Data of Senior Scientist: xmoan = 24.66% with s = 0.06% for n = 5 Data of the New Kid: xmean = 24.55% with s = 0.10% for n = 7P5.1. Calculate ArxnSoof the reaction: + ½ Ozle) H,Oe) a. at 25 °C b. at 1000 °C Given: 5° /R at 25 °C: H2ie): 15.7041 O2le): 24.6604 H,0R: 22.6984 Cp /R at the temperature range: H2le): 3.4958 - 0.1006 x 103 T/(K) + 2.419 x 107 T²/(K²) Ozleg: 3.0673 + 1.6371 x 103 T/(K) + 5.118 x 107 T/(K?) H,0je: 3.6330 + 1.1950 x 10-3 T/(K) + 1.340 x 10-7 T2/(K2)+ |/ 00 %24 D. Two bulbs are connected by a stopcock. The 7.50 L bulb contains nitric oxide (NO) at a pressure of 0.340 bar, and the 2.50 L bulb contains oxygen (O,) at a pressure of 0.510 bar. 02 ON After the stopcock is opened, the gases mix and react to produce nitrogen dioxide (CON) 2 NO(g) + 0,(g) – 2 NO,(g) Considering that the volume remains unchanged during the experiment, how does the total pressure in the bulbs change if the reaction is allowed to go to completion? The total pressure will remain constant. O There is not enough information to determine how the total pressure will change. O The total pressure will decrease. O The total pressure will increase. MacBook Pro ( The %23 %24 7. 4. 5. 3. R %3D K. H. B C. option command MOSISO
- 20,Hz) + 5 Oz0) 4 CO2o) + 2H,O0) m C3H8 = 22 gram n CO2 ? n H2O ? m CO2 ? m H2O ? Volume CO2 (STP) ? Volume H2O (STP) ?ersion xxam e... /myct/itemView?assignmentProblemID=191818234 ent the basis ween and e of or S d ror f5 % 5 X ▸ Part A Final Exam America.... TN Free Tracing Letter... Letter A | Workshee... Submit Part B Part C 16 Solving Chemical Problems G| ΑΣΦ 3 10 A In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 28.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1 km = 0.6214 mi and 1 gal = 3.78] Express your answer numerically in liters. ► View Available Hint(s) 6 4- & C hp 7 X f8 a + MasteringChemistry: Homework x * ? 8 L Order 3094227- Es... fg 9 h fio ) fi O Review | Constants | Periodic Table f12 + O 6 of 10 ins = M 1:13 PM 8/16/2022 prt sc > del backs37. A student recorded the following data for the alcohol content of a blood sample: % C.H5OH: 0.084, 0.068, and 0.079. Calculate the 95% confidence limit for the average of this data.