A pharmacist bought a specific material from two different Providers. To compare the level of impurities present in the purchases made the two suppliers, the pharmacist measured the percentage of impurities present in each of the groups, obtaining the following: Supplier A: 1.8 2.5 1.5 1.2 1.0 Supplier B: 1.6 2.5 1.2 2.3 1.5 Which of the purchases has greater uniformity in impurities? Justify properly
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A pharmacist bought a specific material from two different Providers. To compare the level of impurities present in the purchases made the two suppliers, the pharmacist measured the percentage of impurities present in each of the groups, obtaining the following:
Supplier A: 1.8 2.5 1.5 1.2 1.0
Supplier B: 1.6 2.5 1.2 2.3 1.5
Which of the purchases has greater uniformity in impurities? Justify properly.
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- A manufacturer of aluminium cans measured the level of impurities in 24 cans. The amounts of impurities, in percent, were as follows. 7.1 2.6 8.3 4.6 9.3 5.1 8.3 1.7 6.0 9.2 7.3 6.8 4.4 8.7 7.9 8.0 6.2 8.3 4.8 8.6 9.1 6.5 5.7 9.4 Send data to Excel Part: 0 / 2 0 Part 1 of 2 Construct a boxplot for the given sample. B;8 2 3 5 6 X 7 8 4 9 10A manufacturer of aluminum cans measured the level of impurities in 24 cans. The amounts of impurities, in percent, were as follows. 2.0 0.8 5.8 1.2 1.7 1.4 7.2 1.5 9.4 1.9 0.9 2.8 3.2 3.4 0.7 3.7 3.8 4.3 4.8 1.4 6.7 4.7 8.3 1.4 Choose the correct histogram for this sample.A manufacturer of aluminium cans measured the level of impurities in 24 cans. The amounts of impurities, in percent, were as follows. 3.6 1.6 2.0 2.4 6.7 1.4 3.2 5.2 3.8 5.6 8.9 4.1 4.5 4.7 5.0 2.8 5.8 6.1 3.9 6.9 8.0 3.4 3.2 3.8 part 2. yes or no
- A manufacturer of aluminum cans measured the level of impurities in 24 cans. The amounts of impurities, in percent, were as follows. 9.4 1.4 4.6 5.6 5.1 2.8 4.1 3.4 6.8 4.1 1.8 4.2 4.3 2.2 4.8 5.0 3.8 5.3 1.2 6.2 4.1 2.4 2.9 3.4 part 2. can or cannot for second bar.A metal casting process for the production of turbine blades was studied. Three factors were varied. They were A: the temperature of the metal, B: the temperature of the mold, and C: the pour speed. The outcome was the thickness of the blades, in mm. The results are presented in the following table. Thickness 4.61 B -1 -1 -1 -1 -1 4.51 -1 -1 4.60 -1 4.54 -1 4.61 4.61 -1 4.48 4.51 a. Compute estimates of the main effects and the interactions. b. Is it possible to compute an error sum of squares? Explain. Plot the estimates on a normal probability plot. Does the plot show that some of the factors influence the thickness? Éxplain. C.Brake wear: For a sample of 9 automobiles, the mileage (in 1000 s of miles) at which the original front brake pads were worn to 11% of their original thickness was measured, as was the mileage at which the original rear brake pads were worn to 11% of their original thickness. The results were as follows: Car Rear Front 1 41.2 32.7 2 35.9 27.6 46.8 35.5 46.3 38.2 38.6 29.2 51.9 43.9 51.3 41.2 46.7 37.6 46.1 38.0 3 4 5 6 7 8 9 Send data to Excel Part: 0 / 2 Part 1 of 2 (a) Construct a 95% confidence interval for the difference in mean lifetime between the front and rear brake pads. Let d represent the mileage of the rear pads minus the mileage of the front ones. Round the answers to two decimal places. A 95% confidence interval for the mean difference in lifetime between front and rear brake pads is kua < Par Part: 1 / 2 of 2 X (b) An automotive engineer claims that the mean lifetime for rear brake pads is more than 10,000 miles more than the mean lifetime for front brake pads. Does the…
- Meteorologists in Texas want to increase the amount of rain delivered by thunderheads by seeding the clouds. Without seeding, thunderheads produce, on average, 300 acre feet. The meteorologists randomly selected 30 clouds which they seeded with silver iodide to test their theory that average acre feet of rain produced is more than 300. Which of the following is the most appropriate test for this data? a. One Sample t Test b. Sign Test c. One Proportion Z TestThe boxplots below show the number of marshmallows in a bag, as estimated by students in two elementary school classes. 250 225 200 175 150 125 100 75 50 25 0 L Ms. Apple's Class Ms. Banana's Class Which class has the greater percentage of estimates over 100? A. Ms. Apple's class B. Ms. Banana's class C. Both classes have the same percentage of estimates over 100. D. It is impossible to tell from the boxplots.The densities of several common metals are shown in the following table. Metal Density (g/cm³) iron 7.87 silver 10.49 lead 11.36 zinc 7.13 aluminum 2.70 For her chemistry lab, Kamila needs to identify three metal samples by density. The data she collected is shown in the following table. The metal samples are all rectangular prisms.
- For each problem, you must state the hypotheses, calculate the test statistic, and explain your decision. A sample of 25 cities have been classified as high or low on their homicide rates and on the number of handguns sold within the city limits: a. The table is constructed assuming that homicide rate is the independent variable. Please add %s in the appropriate position (columns or rows) to describe the pattern of the relationship. b. Is there a statistically significant relationship between these variables?6. Setup: JP was curious about the sodium content of organic cornflakes. To investigate this, twenty 300-gram boxes of organic cornflakes were obtained and the sodium content was measured. The data (in milligrams) are as follows: 131.1, 130.7, 130.9, 129.5, 129.6, 128.8, 130.7, 128.3, 128.2, 129.7, 130.1, 129.3, 128.7, 129.0, 129.4, 130.4, 129.5, 130.1, 129.8, 130.0 Task: Perform a hypothesis test using R to determine if you can support a claim that the mean sodium content of this brand of cornflakes differs from 130 milligrams? Use a = 0.08 to make your decision. R Output: Upon running your analysis in R, you obtain the following results: One Sample t-test data: corn = 0.1121 t = -1.6659, df = alternative hypothesis: true mean is not equal to 130 19, р-value 92 percent confidence interval: 129.3458 130.0342 sample estimates: mean of x 129.69 Questions: (a) State the hypotheses used in performing this test. (b) Using the output above, state the decision (Reject or Not Reject Ho) of the…A food inspector in the Techinman Municipal examining 12 Jars of a certain brand of shea butter, obtained the following percentage of impurities. 2.3, 1.9, 2.1, 2.8, 2.3, 3.6, 1.4, 1.8, 2.1, 3.2, 2.0 and 1.3 The inspector knows from experience that the average maximum impurities is 2.8 percent. Assuming that the sample comes from a normal population, Test at 2% significance level whether the inspectors claim is a. accurate b. Construct a 98% confidence interval for the true average impurities