In a study of the relationship of the shape of a tablet to its dissolution time, 6 disk-shaped ibuprofen tablets and 8 oval-shaped ibuprofen tablets were dissolved in water. The dissolve times, in seconds, were as follows: Disk: 269.0 249.3 255.2 252.7 247.0 261.6 Oval: 268.8 260.0 273.5 253.9 278.5 289.4 261.6 280.2 Can you conclude that the mean dissolve times differ between the two shapes?

In a study of the relationship of the shape of a tablet to its dissolution time, 6 disk-shaped ibuprofen tablets and 8 oval-shaped ibuprofen tablets were dissolved in water. The dissolve times, in seconds, were as follows: Disk: 269.0 249.3 255.2 252.7 247.0 261.6 Oval: 268.8 260.0 273.5 253.9 278.5 289.4 261.6 280.2 Can you conclude that the mean dissolve times differ between the two shapes?

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Description: In a study of the relationship of the shape of a tablet to its dissolution time, 6 disk-shaped ibuprofen tablets and 8 oval-shaped ibuprofen tablets were dissolved in water. The dissolve times, in seconds, were as follows: Disk: 269.0 249.3 255.2 252

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter12: Quadratic Functions

Section12.6: Solving Problems Involving Quadratic Equations

Problem 1.3E

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3. In a study of the relationship of the shape of a tablet to its dissolution time, 6 disk-shaped ibuprofen tablets and 8 oval-shaped ibuprofen tablets were dissolved in water. The dissolve times, in seconds, were as follows: Disk: 269.0 249.3 255.2 252.7 247.0 261.6 268.8 260.0 273.5 253.9 278.5 289.4 Oval: 261.6 280.2 Can you conclude that the mean dissolve times differ between the two shapes?
A sample of ore is found to be 0.0022% gold and 0.059% silver. What is the percentage of matter in the ore that is neither gold or silver?
6. 257 - 134% D %3D 7. 457-242% D %3D 8. 498- 276 = %3D 9. 849 - 615 = %3D
Water quality measurements are taken daily on the River Ouse at Clapham, England.The concentrations of chlorides and phosphates in solution, given below in milligrams per liter, are determined over a 30-day period.Chloride: 64.0, 66.0, 64.0, 62.0, 65.0, 64.0, 64.0, 65.0, 65.0, 67.0, 67.0, 74.0, 69.0, 68.0, 68.0, 69.0, 63.0, 68.0, 66.0, 66.0, 65.0, 64.0, 63.0, 66.0, 55.0, 69.0, 65.0, 61.0, 62.0, 62.0Phosphate: 1.31, 1.39, 1.59, 1.68, 1.89, 1.98, 1.97, 1.99, 1.98, 2.15, 2.12, 1.90 1.92, 2.00, 1.90, 1.74, 1.81, 1.86, 1.86, 1.65, 1.58, 1.74, 1.89, 1.94, 2.07, 1.58, 1.93, 1.72, 1.73, 1.82COMPARE the coefficients of variation and DEDUCE the correlation coefficient. Comment on the results.
Water quality measurements are taken daily on the River Ouse at Clapham, England. The concentrations of chlorides and phosphates in solution, given below in milligrams per liter, are determined over a 30-day period. Chloride: 64.0, 66.0, 64.0, 62.0, 65.0, 64.0, 64.0, 65.0, 65.0, 67.0, 67.0, 74.0, 69.0, 68.0, 68.0, 69.0, 63.0, 68.0, 66.0, 66.0, 65.0, 64.0, 63.0, 66.0, 55.0, 69.0, 65.0, 61.0, 62.0, 62.0 Phosphate: 1.31, 1.39, 1.59, 1.68, 1.89, 1.98, 1.97, 1.99, 1.98, 2.15, 2.12, 1.90 1.92, 2.00, 1.90, 1.74, 1.81, 1.86, 1.86, 1.65, 1.58, 1.74, 1.89, 1.94, 2.07, 1.58, 1.93, 1.72, 1.73, 1.82 COMPARE the coefficients of variation and DEDUCE the correlation coefficient. Comment on the results.
Three different corrosion-resistant coatings are being considered for use on iron pipes. Ten pieces of pipe are marked off in six equal segments. For each pipe, two segments received coating A, two received coating B, and the remaining two received coating C. The pipes were placed in a corrosive environment for a period of time; then the depth of the deepest pit (in mm) caused by corrosion was measured for each segment on each pipe. The effect of interest is the coating; the pipe is a blocking factor, and there were two replications on each pipe. The following sums of squares were calculated: sum of squares for blocks = 11.2, sum of squares for treatments = 4.8, sum of squares for interactions = 18.4, total sum of squares = 44.7. a) Construct an ANOVA table. You may give ranges for the P-values. b) Are the assumptions for a randomized complete block design satisfied? Explain. c) Does the ANOVA table provide evidence that mean pit depth differs among coatings? Explain.
Radon is a gas emitted from the ground that can collect in houses in buildings. At certain levels it can cause lung cancer. Radon concentrations are measured in picocuries per liter (pCi/L). A radon level of 4 pCi/L is considered “acceptable” Radon levels in a house vary from week to week. In one house, a sample of 6 weeks had the following readings for radon level (in pCi/L): 1.9 2.8 3.9 3.9 4.2 5.7 Find the variance and standard deviation (definitional formula). Show your work using a table.
A body of mass M1 has 1/4 times the linear momemtum of M2 if M2 has three times the mass of M1, what the relationship between V1 and V2 ? Select one: O a. V2 = (1/12) * V1 O b. V1 = (3/4) * V2 O . V1 = (4/3) * V2 O d. V1 = 12 * M2 %3D e. V2 = (4/3) * V1
The following data are given for a biogas digester suitable for the output of six cows. The volume of digester is 7.5 m3 , the volume of gas holder is 4 m³ and the retention time is 26 days . Find the height of gas holder height of gas holder =- cm
To study the effect of temperature on yield in a chemical process, five batches were produced at each of three temperature levels. The results follow.
Periodically, the county Water Department tests the drinking water of homeowners for contaminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (g/L) copper (mg/L) 2.9 0.2 5.1 4.2 5.5 1.2 0.3 1.3 4.9 1.7 0.133 0.774 0.214 0.671 0.444 0.234 0.357 0.761 0.176 0.888 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. OSASO (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. ≤H≤
cientists studied the chemical makeup of buried tills (glacial drifts) in order to estimate the age of the glacial drifts. The ratio of the elements aluminum (Al) and ryllium (Be) in sediment is related to the duration of burial. The till specimens were obtained from five different boreholes (labeled UMRB-1, UMRB-2, UMRB-3, SWRA nd SD). The Al/Be ratios for a sample of 26 buried till specimens were determined and are shown in the accompanying table. Conduct an analysis of variance of the ata. Is there sufficient evidence to indicate differences among the mean Al/Be ratios for the five boreholes? Test, using α = 0.10. Click the icon to view the table. et up the null and the alternative hypotheses. Choose the correct answer below. OA. Ho: At least two treatment means differ and Ha: ₁ = H₂ = H3 = H4 = H5 B. Ho: H₁ = μ₂ = 3 = H4 = μ5 and H₂: At least two treatment means differ a O C. Ho: M₁