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A: Option (a) is correct.
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Q: A botanist can purchase plant food of four different types, I, II, III, and IV. Each food comes in…
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A: Please refer to the image below
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- Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows: Duration of Exposure <1 1 to <5 ≥5 Diseased 14 13 18 Sensitized 11 20 15 Normal 78 140 209 Test the hypothesis of independence. Use the a=0.10 level of significance and the P-value method with the TI-84 Plus calculator. What do you conclude? State the null and alternate hypotheses.A research focused on the number of illnesses involving the organism Escherichia coli (01257:H7), which causes a breakdown of red blood cells and intestinal hemorrhage in its victims. According to the Center for Disease Control of the Department of Health, an estimated 73,000 cases of E. coli infection and 61 deaths occur in Region Y. A 2028 outbreak traced to wild pigs, who spread the bacteria into a cabbage field in that , sickened 204 people in 26 municipalities. Outbreaks have occurred at a rate of 2.5 per 100,000. Let us suppose that this rate has not changed.a. What is the probability that at most five cases of E.coli per 100,000 are reported in California this year?b. What is the probability that more than five cases of E. coli are reported in California this year?c. Approximately 95% of occurrences of E. coli involve at most how many cases?Test the hypothesis that the average weekly allowance of female and male ACC 215 students the same, at 5% level of significance. (Step by step solution without using excel) Weekly Allowance of Students (Php)Male: 1500 2000 2500 2500 2000 1750 2000 1800Female:1500 2000 1750 1500 2000 2500 3000 3500 Decision Rule:Computation:Decision:Conclusion:
- A researcher was interested to compare the effect of 5 different chemicalconcentrations on the growth (in cm) of a particular crop. The plants werearranged in 20 different pots in the lab conditions by using a specific chemical concentration in 4 different pots.a). Which experimental design you will suggest to compare the effect of 5 different chemical concentrations, justify your statement.b). What will be the layout of this experiment, denote 5 different chemicalconcentrations as A, B, C, D and E.c). Identify dependent and independent variables in this experiment. Also identify the experimental unit.d). Draw ANOVA for this particular experiment showing the first two columns.e). Justify, whether the experiment is a single factor experiment or multi-factor experiment?Open water oil spills, such as the Deepwater Horizon spill of 2010, can wreak terrible consequences on the environment and be expensive to clean up. Many physical and biological methods have been developed to recover oil from water surfaces. In the article “Capacity of Straw for Repeated Binding of Crude Oil from Salt Water and Its Effect on Biodegradation” (J. Hazard. Toxic Radioact. Waste, 2012: 75–78), researchers examined how wheat straw could be used to extract crude oil from a water surface. An experiment was conducted in which crude oil (0 to 16.9 g) was added to 100 mL of saltwater in separate Petri dishes. Wheat straw (2 g) was then added to each dish and all dishes were shaken at 70 rpm overnight. The following data read from a graph is based on the amount of oil added (in g) and the corresponding amount of oil recovered (in g) from wheat straw. a. For each observation, determine the percentage of oil recovery by wheat straw. Is this percentage relatively…A deficiency of the trace element selenium in the dietcan negatively impact growth, immunity, muscle andneuromuscular function, and fertility. The introductionof selenium supplements to dairy cows is justifiedwhen pastures have low selenium levels. Authors ofthe article “Effects of Short-Term Supplementationwith Selenised Yeast on Milk Production andComposition of Lactating Cows” (Australian J. ofDairy Tech., 2004: 199–203) supplied the followingdata on milk selenium concentration (mg/L) for asample of cows given a selenium supplement and acontrol sample given no supplement, both initially andafter a 9-day period.Obs Init Se Init Cont Final Se Final Cont1 11.4 9.1 138.3 9.32 9.6 8.7 104.0 8.83 10.1 9.7 96.4 8.84 8.5 10.8 89.0 10.15 10.3 10.9 88.0 9.66 10.6 10.6 103.8 8.6 Obs Init Se Init Cont Final Se Final Cont7 11.8 10.1 147.3 10.48 9.8 12.3 97.1 12.49 10.9 8.8 172.6 9.310 10.3 10.4 146.3 9.511 10.2 10.9 99.0 8.412 11.4 10.4 122.3 8.713 9.2 11.6 103.0 12.514 10.6 10.9 117.8 9.115…
- PLE collects a variety of data from special studies, many of which are related to the quality of its products. The company collects data about functional test performance of its mowers after assembly; results from the past 30 days are given in the worksheet Mower Test. In addition, many in-process measurements are taken to ensure that manufacturing processes remain in control and can produce according to design specifications. The worksheet Blade Weight shows 350 measurements of blade weights taken from the manufacturing process that produces mower blades during the most recent shift. Elizabeth Burke has asked you to study these data from an analytics perspective. Drawing upon your experience, you have developed a number of questions: For the mower test data, what distribution might be appropriate to model the failure of an individual mower? What fraction of mowers fails the functional performance test using all the mower test data? What is the probability of having x failures in the…A research company has designed three different systems to clean up oil spillages. The following table contains the results, measured by how much surface area (in square meters) is cleared in 1 hour. The data were found by testing each method in several trials. Is there any significant difference in the testing of effectiveness of the three systems? Use the 0.05 level of significance. System A System B System C 293 295 304 298 291 290 301 302 299 294 287 295 297 300 - 293 - -In an agricultural experiment using barley, the effects of various commercial fertilizers and planting densities on yield were studied. Six different commercial fertilizers were used and the barley was planted in three different densities. The plots used were quite uniform with respect to soil characteristics, drainage, etc. The yields in kilograms per plot are recorded in the following table. Analyze these data completely as a Factorial Design Two-Way ANOVA. Discuss the results in terms of interactions and main effects. What combination of fertilizer and planting density would you recommend to barley growers? Why? (You do not need to calculate by hand, use SAS program) Plant density Commercial fertilizer A I II III VI V VI 27 26 31 30 25 30 29 25 30 27 25 32 26 24 30 33 26 28 26 29 33 30 24 30 B 30 28 31 32 28 31 30 29…
- One of the issues facing organizations is increasing diversity throughout an organization. One of the ways to evaluate an organi- zation's success at increasing diversity is to compare the percentage of employees in the organization in a particular position with a specific background to the percentage in a particular position with that specific background in the general workforce. Recently, a large academic medical center determined that 9 of 17 employees in a particular position were female, whereas 55% of the employees for this position in the general workforce were female. At the 0.05 level of significance, is there evidence that the proportion of females in this position at this medical center is different from would be expected in the general workforce?The Department of Natural Resources (DNR) received a complaint from recreational fishermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish residing in the river. An inspector from the DNR designs a study to investigate the fishermen’s claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million (ppm) are given in the following table.Upstream 5.2 4.8 5.1 5.0 4.9 4.8 5.0 4.7 4.7 5.0 4.6 5.2 5.0 4.9 4.7, Downstream 3.2 3.4 3.7 3.9 3.6 3.8 3.9 3.6 4.1 3.3 4.5 3.7 3.9 3.8 3.7 a.In order for the discharge to have an impact on fish health, there needs to be at least a 0.5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean dissolved oxygen…An agronomist undertook an experiment to investigate the factors that potato harvest. In his research, agronomist decided to divide the farm into 30 half hectare plots and apply varies level of fertilizer. Potato was then planted and the harvest at the end of the season was recorded. Fertilizer(Kg) Harvest (tons) 210 43.5 220 40.0 230 48.0 240 65.0 250 80.0 260 85.0 270 95.0 280 80.0 290 97.3 Note: No excel ANOVA output allowed. Students need to show all the steps in calculations. You are required to; Find the simple regression line and interpret the coefficients. Find the coefficient of determination and interpret its value. Does the model appear to be a useful tool in predicting the potato harvest? If so, predict the harvest when 250KG of fertilizer is applied. If not explain why not.