Observations on burst strength (lb/in²) were obtained both for test nozzle closure welds and for production canister nozzle welds.+ Test Cannister 7200 6100 7300 7300 8000 7400 7300 7300 8000 6700 8300 5250 5625 5900 5900 5700 6050 5800 6000 5875 6100 5850 6600 A comparative boxplot is given below. Test Nozzle Cannister- * 5000 5500 6000 6500 7000 Burst strength (b/in^2) 7500 8000 8500 Comment on interesting features (the cited article did not include such a picture, but the authors commented that they had looked at one). (Select all that apply.) ☐ The production canister welds data contain 2 outliers. ☐ The test nozzle welds have much more variable burst strengths. The test nozzle welds data contain 2 outliers. ☐ The production canister welds have much higher burst strengths. The production canister welds have consistently lower burst strengths than the test nozzle welds. ☐ The production canister welds have much more variable burst strengths.

The quality control engineer at Palmer Industries is interested in estimating the tensile strength of steel wire based on its outside diameter and the amount of molybdenum in the steel. As an experiment, she selected 25 pieces of wire, measured the outside diameters, and determined the molybdenum content. Then she measured the tensile strength of each piece. The results of the first four are recorded in the table.     Tensile Strength Outside Diameter Amount of Molybdenum Place (PSI ) Y (mm) X1 (Units) X2 A 11 0.3 6 B 9 0.2 5 C 16 0.4 8 D 12 0.3 7 Using a statistical software package, the QC engineer determined the multiple regression equation to be Y’=-0.5+20X1+1X2. a)       Based on the equation, what is the estimated tensile strength of a steel wire having an outside diameter of .35 mm and 6.4 units of molybdenum? b)      Interpret the value of b1 in the equation.

PT. X is an industry engaged in concrete steel with various diameter sizes. The product that is mostly produced is concrete iron with a diameter of 12 mm because it suits the needs of consumers and the current pandemic conditions. During the period from January to December 2019, PT. X is capable of producing as many as 6800 tonnes of units. From the results produced, there is a product defect of 70.4 with the type of product damage, namely overfill (wing), overlap (excessive shape), underfill (kempong) and scratch (beret). In that period, defects were found above the tolerance limit of 2%, namely at week 5 and week 12 of 2.42% and 2.21%. During the production process PT.X has a 2% probability of producing defective products. If you check is 065, then determine:a. P(X=0)b. P(X=1)c. P(X=2)d. P(X≤2)e. P(X≥3)

A study was conducted by the Department of Biological Sciences at Virginia Tech to determine if there is a significant difference in the density of organisms at two different stations located on Cedar Run, a secondary stream in the Roanoke River drainage basin. Sewage from a sewage treatment plant and overflow from the Federal Mogul Corporation settling pond enter the stream near its headwaters. The accompanying data give the density measurements, in number of organisms per square meter, at the two collecting stations. Can it be concluded, at the 0.05 level of significance, that the average densities at the two stations are equal? Assume that the observations come from normal populations with different variances. Click the icon to view the data on organisms per square meter. Let sample 1 be the station 1 data and let sample 2 be the station 2 data. State the null and alternative hypotheses. Hoi Hy-H2 = 0 H₁ H1 H2 0 (Type integers or decimals. Do not round.) Find the test statistic. The…