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Q: Imagine a soldier in a trench during an armed conflict. In the enemy camp, inside another trench, is…
A: P(sniper) = 0.001 P(regular) = 0.999 P(hit |sniper) = 0.87 P(hit | regular) = 0.18
Q: The average concentration of ozone in unpolluted tropospheric air is 50 ppbV (that is, fifty…
A: (1) The five (i.e. n= 5) concentration measurement obtained values are: 30, 74, 48, 90, and 85 ppb.…
Q: Surfer Dude Swimsuit Company plans to produce a new line of quick-dry swimsuits. Five textile…
A: Hello, since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
Q: Surfer Dude Swimsuit Company plans to produce a new line of quick-dry swimsuits. Five textile…
A: Hello, since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
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Q: Arsenic is a chemical element that occurs in many minerals, usually in conjunction with sulfur and…
A: Given Information: Population mean (u) = 8 ppb Sample mean (x) = 7.2 ppb Standard Deviation (s) =1.9…
Q: AN OUTDOOR HOT DOG VENDOR SELLS AN AVERAGE OF 60 HOT DOGS PER DAY IN DRY WEATHER AND AN AVERAGE OF…
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A: The objective is to find the appropriate test to compare average birth weight between autistic and…
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A: Given that the weather in this area is wet 20% of the time. So (100-20)=80% time it is dry. Let us…
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A: Suppose is the population mean weight of babies of younger mother.It is needed to test whether the…
Q: The bottled beverage industry will use robots to fill drinks in bottles containing 1000 ml. There…
A: We have given that µ1 = the average spill from robot A, µ2 = the average from robot B, then the…
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Q: One study investigated whether the thickness of the banana peel is related to the banana variety and…
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A: Paired data: If the data comes from same observational unit, then it is called paired data.
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A: variance=∑(x-x¯)2nstandard deviation=∑(x-x¯)2nlet us find x¯=sum of all obervationsn=22.46=3.733…
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Q: Surfer Dude swimsuit company plans to produce a new line of quick-dry swimsuits. Four textile…
A: Hello, since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
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The bottled beverage industry will use robots to fill drinks in bottles containing 1000 ml. There are 2 robot companies (A and B) that offer the industry. Beverage industry managers want the number of drinks that are filled into bottles not to be spilled. Robots are selected that produce the least spillage. To select the robot to be used, experiments were carried out on both robots and observed the amount of drink that spilled from each bottle. If µ1 = the average spill from robot A, µ2 = the average from robot B, then the hypothesis that can be tested from the data:)
- Ho: µ1- µ2 < 0 dan Ha: µ1- µ2 >= 0
- (other)
- Ho: µ1- µ2 <= 0 dan Ha: µ1- µ2 > 0
Ho: µ1- µ2 = 0 dan Ha: µ1- µ2 not equal to 0
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- Find the mean hourly cost when the cell phone described above is used for 240 minutes.The bottled beverage industry will use robots to fill drinks in bottles containing 1000 ml. There are 2 robot companies (A and B) that offer the industry. Beverage industry managers want the number of drinks that are filled into bottles not to be spilled. Robots are selected that produce the least spillage. To select the robot to be used, experiments were carried out on both robots and observed the amount of drink that spilled from each bottle. If µ1 = the average spill from robot A, µ2 = the average from robot B, then the hypothesis that can be tested from the data:) Ho: µ1- µ2 < 0 dan Ha: µ1- µ2 >= 0 Lainnya (other) Ho: µ1- µ2 <= 0 dan Ha: µ1- µ2 > 0 Ho: µ1- µ2 = 0 dan Ha: µ1- µ2 not equal to 0Arsenic is a chemical element that occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. The main use of metallic arsenic is for strengthening alloys of copper and lead. Unfortunately, arsenic occurs in some ground water. In large quantities it is toxic for multicellular life. A mean arsenic level of 8 particles per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested regularly for arsenic. A random sample 37 tests gave a sample mean of 7.2 ppb arsenic with standard deviation of 1.9 ppb. Assume that arsenic levels are normally distributed. We are to use the sample data and test if mean arsenic level in the well in question is less than 8 ppb. a. Test statistic isb. The ? − value of the test isc. At the significance level calculated in part c), we conclude that mean arsenic level in thewell is
- 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.A researcher wonders whether younger mothers have babies that are significantly heavier or lighter than the population average of μ 7.25 pounds. The researcher collects data from N = 35 babies who were born to mothers between the ages of 16 and 18. The average weight for these babies was M = 7.15 pounds (SD = .6 pounds).The average concentration of ozone in unpolluted tropospheric air is 50 ppbV (that is, fifty molecules of ozone per billion molecules of air). You are trying to determine whether pollution has elevated average tropospheric ozone concentrations above the 50 ppbV “background” level at a particular location. You take five concentration measurements and obtain values of 30, 74, 48, 90, and 85 ppb. Based on other studies of ozone in the troposphere, you assume that these measurements were obtained from a normal distribution. Note in this instance, the null hypothesis should be set up similar to the way I set things up in the lecture for the DeSpoille and Pillage example. (a) What are the mean, standard deviation, and standard error of the mean of measured ozone concentrations? (b) In testing whether the average concentration is elevated above the “background”, what should be yournull hypothesis? Should you use a one- or two-tailed test? (c) Can you reject the null hypothesis at a…
- Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms of fat‑free body mass per square meter of body surface area (kg/m2). Typical young men have about 20 kg/m2.. Each subject chose two images, one that represented his own level of body muscle and one that he thought represented "what women prefer." The mean gap between self‑image and "what women prefer" was 2.35 kg/m2.. Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m2.. If young men thought that their own level of muscle was about what women prefer, the mean "muscle gap" in the study would be 0. We suspect (before seeing the data) that (most) young men tend to think women prefer more muscle than they themselves have. What is the value of the test…One study investigated whether the thickness of the banana peel is related to the banana variety and the fertilizer used. The research examined 4 different banana varieties and 3 different fertilizers.The following values were calculated from the data:SSr = 3.4 SSc =1.3 SSe =1.2The research first set out to find out if there is a difference in the average thickness of the banana peel between the fertilizers used. The used fertilizers are presented in the material with columns.Calculate the p-value of the test. Give the answer to two decimal places. Remember the correct decimal separator.A statistics professor administered an exam to three different classes. The 8:00class had 20 students and an average score of 82.4. The 9:00 class had 24students and an average of 78.9. The 29 students in the 10:00 class had anaverage of 87.3. Calculate the overall average for all three classes combined.
- 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?Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms of fat-free body mass per square meter of body surface area (kg/m2). Typical young men have about 20 kg/m?. Each subject chose two images, one that represented his own level of body muscle and one that he thought represented "what women prefer." The mean gap between self-image and "what women prefer" was 2.35 kg/m?. Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m2. If young men thought that their own level of muscle was about what women prefer, the mean "muscle gap" in the study would be 0. We suspect (before seeing the data) that (most) young men tend to think women prefer more muscle than they themselves have. What is the value of the test statistic z?…A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 234 days. After a revised mix has been developed, a sample of nine boxes of cake mix gave these shelf lives (in days): 232,238, 238, 239, 236, 243, 243, 244, and 240. At a = 0.05, the manufacturer wants to test if the shelf life of the cake mix increased. What critical value must be used for this test?
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