Student Discipline Problems The data for a random sample of 32 months for the number of discipline problems that occurred each month at a large high school are shown. Find the 99% confidence interval for the mean when σ 3. Round your answers to one decimal place. = 13 19 10 11 14 25 16 27 22 29 23 29 28 17 17 22 28 26 29 20 22 18 14 215 16 27 17 14 17 110 11 20 19 22 Send data to Excel We are 99% confident that the mean is between 15.1 and 17.8 discipline problems per month.

Student Discipline Problems The data for a random sample of 32 months for the number of discipline problems that occurred each month at a large high school are shown. Find the 99% confidence interval for the mean when σ 3. Round your answers to one decimal place. = 13 19 10 11 14 25 16 27 22 29 23 29 28 17 17 22 28 26 29 20 22 18 14 215 16 27 17 14 17 110 11 20 19 22 Send data to Excel We are 99% confident that the mean is between 15.1 and 17.8 discipline problems per month.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Perform the calculations and determine the absolute and percent relative uncertainty. Express each answer with the correct number of significant figures. To avoid rounding errors, do not round your answers until the very end of your calculations. [9.8 (±0.3) — 2.31 (±0.01)] 8.5 (+0.6) = absolute uncertainty: + 0.76 Incorrect percent relative uncertainty: 0.88 + 86.36 Incorrect 9.2 (+0.4) × ([5.4 (±0.3) × 10−³] + [5.6 (±0.1) × 10-³]) = Incorrect %
Chrome File Edit View History Bookmarks Profiles Tab Window Help Sun Sep 26 1:21 PM Calendar Course Home Significant Figures Calculator x b Chemistry Question | bartleby x + openvellum.ecollege.com/course.html?courseld=16846218&OpenVellumHMAC=Ddbacfbcfc14ee9f30d6c137a34986a18#10001 L Aluminum, Express your answer in calories per gram per degree Celsius to two significant figures. 0.214 0.897 Al(s) Copper, Cu(s) 0.0920 0.385 ? Gold, Au(s) 0.0308 0.129 Iron, Fe(s) 0.108 0.452 cal/(g .° C) Silver, Ag(s) 0.0562 0.235 Titanium, Ti(s) 0.125 0.523 Submit Request Answer Compounds Ammonia, 0.488 2.04 NH3 (s) Part B Complete previous part(s) Ethanol, 0.588 2.46 C2 H6 O(s) Sodium chloride, Provide Feedback Next > 0.207 0.864 NaCl(s) Water, H2 O(1) 1.00 4.184 Water, H2 0(s) 0.485 2.03 4,419 SEP 1 CC étv 26 280 00 圖

320.28 - (6107.5/2.8). Express your answer to the appropriate number of significant digits. [(289.8 x 105 ) - (1.100 x 103 )] x 2.8974. Express your answer to the appropriate number of significant digits. (0.0041×20000.0)+(2817×14). Express your answer to the appropriate number of significant digits. 865×[1259−(3.98×106)]. Express your answer to the appropriate number of significant digits.
I cannot figure this question out. I cannot find any one of these numbers that has 3 significant figures, and when I say that 200 has 1 I get it wrong.
(a) Use the following theoretical density values for copper and zinc metals (in g/mL) and the experimental density values you obtained in Question 12 to determine the percent error in each of your experimental values. Density of copper (theoretical) ρCu = 8.94 g/mL Density of zinc (theoretical) ΡZn = 7.14 g/mL The equation for percent error is: "%Error"=|"Experimental value - Theoretical value" /"Theoretical value" |×100 Show your work and calculated values, include units. (b) Suggest possible reasons for differences between the experimental and theoretical density values for each metal. 14. Describe any issues you had with the virtual lab, or any unrealistic situations you thought were funny. Also describe the benefits and deficiencies you seen in virtual labs compared to real lab experiences.
Using the data below (included for context), what is the equation for the trendline for the data points that fall in the linear range (linear range was found to be timepoints 1 min to 4 min,)? Your answer should be in the form of y = mx + b. Make sure that your trendline only includes the data points that fall in the linear range. In order to determine the trendline using Excel, you may need to create a new graph that only includes the earlier data points. With your new trendline, what is the initial velocity when 1 nM OXA-M290 is mixed with 60 μM nitrocefin? Make sure to include units in your answer. Context: DO NOT ANSWER Concentration of hydrolyzed nitrocefin at 20 time points. Graph attached below Time (min) Concentration (μM) 0.5 6.01 1 11.78 1.5 17.6 2 23.51 2.5 29.58 3 35.31 3.5 39.73 4 44.5 4.5 48.18 5 50.05 5.5 52.72 6 54.01 6.5 55.06 7 55.65 7.5…
Chrome File Edit View History Bookmarks Profiles Tab Window Help Sun Sep 26 1:19 PM Calendar Course Home Significant Figures Calculator x + openvellum.ecollege.com/course.html?courseld=16846218&OpenVellumHMAC=Ddbacfbcfc14ee9f30d6c137a34986a18#10001 TVIτ νT ITJ U ILJ Mastering Chemistry Course Home My Courses Syllabus You may want to reference (Pages 82 - 88) Section 3.7 while completing this problem. Scores The melting point of benzene is 5.5°C and its boiling point is 80.1° C. eТext Part A Document Sharing User Settings Indicate the phase of benzene at each of the following temperatures. Drag the appropriate items to their respective bins. Course Tools > Reset Help 68°C 96° C 25°C Solid Liquid Gas 4,419 SEP 1 CC ktv 26 280 00
After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40 and processing her data, Sally found that her drinking strength Kool-Aid sample had a concentration of 4.692 x 10–5 M. If 0.132 grams of Kool-Aid powder was used to prepare an 8-fl oz cup of her assigned flavor, what is the percent by mass of FD&C Red 40 in her Kool-aid powder? Report your answer as a percentage with two places after the decimal. Do not include the percentage sign in your answer. Pay attention to units. You are trying to find the mass percentage of red dye, so you need to know each variable in the equation in Appendix B. Note that the percent by mass equation should be multiplied by 100. There may be some useful conversion factors in the experimental procedure.
A handbook lists the density of lead as 11.3 g/mL. Several groups of students are attempting to determine the density of a lead weight by various methods. Calculate the average density measured by each group, and the percentage error in each average. Measured densities (g/mL) Group 1 Group 2 Group 3 Trial 1 12.7 11.5 10.9 Trial 2 11.2 11.4 11.3 Trial 3 10.3 11.4 11.1 average density of group 1: g/mL percent error of group 1: average density of group 2: g/mL percent error of group 2: average density of group 3: g/mL percent error of group 3: Which group was most accurate? Which group was most precise? O group 2 O group 1 group 3 O group 3 O group 1 O group 2 G Search or type URL +] %24 % & 8 R T Y P
What is the density (g/mL) of the unknown based on the plot?
4. Calculate the error and percent error of a sample of water using the following data: the actual density of water at 23 °C is 0.999765 g mL-1 and the experimental density (at 23 °C) is 1.097 g mL-1. Show your work and watch your significant figures. O, Focus a
Compare the objects and masses from Part III. Which measurement included the highest percent of uncertainty? Explain why this measurement had more uncertainty than the others.