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- Suppose the 24 soil samples have widely different pH values. What problems may occur by simply randomly assigning the soil samples to the different devices?One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within 10.005 inch of the length specified by the automobile company. Data are collected from a sample of 50 steel parts and are shown in the following table. The measurement reported is the difference in inches between the actual length of the steel part, as measured by a laser measurement device, and the specified length of the steel part. For example, the first value, -0.003, represents a steel part that is 0.003 inch shorter than the specified length. Complete parts a through c Click the icon to view the data table. a. Construct a frequency distribution Difference in Length -0.005 but less than -0.003: -0.003but less than -0.001 -0.001but less than 0.001 0.001but less than 0.003 0.003but less than 0.005 Frequency Difference Between Actual and Specified Lengths 0.002 0 -0.003…The height ( in inches) of a plant x months after an experiment begins is given by
- A company that manufactures golf balls produces a new type of ball that is supposed to travel significantly farther than the company’s previous golf ball. To determine this, 40 new-style golf balls and 40 original-style golf balls are randomly selected from the company’s production line on a specific day. The balls are then placed in a bag and shaken. A golf pro then selects a ball and hits it using a driver. The distance the ball travels is then measured. The bag is shaken again, and the golf pro selects another ball and hits it with the same driver. He continues this procedure until all 80 of the golf balls are hit. Which of the following is a benefit of having replication in the experiment? A)Repeating the experiment will allow the company to compare the distances traveled by the new type of golf ball from both experiments. B)Having a large number of each type of golf ball will allow for a good comparison of the differences in distances traveled for the two types of balls.…If your grade for your AMDM class is computed the following way: Homework – 10% Quizzes – 10% Tests – 60% Final Exam – 20% 1. What would your grade be if you had the following averages? • Test average = 84 • Final exam grade = 72 %3D • Homework = 90 • Quizzes = 95 %3DSuppose the lengths of human pregnancies are normally distributed with u = 266 days and o = 16 days.
- Item 9 At a research facility that designs rocket engines, researchers know that some engines fail to ignite as a result of fuel system error. From a random sample of 40 engines of one design, 14 failed to ignite as a result of fuel system error. From a random sample of 30 engines of a second design, 9 failed to ignite as a result of fuel system error. The researchers want to estimate the difference in the proportion of engine failures for the two designs. Which of the following is the most appropriate method to create the estimate? A one-sample z-interval for a sample proportion A A one-sample z-interval for a population proportion B A two-sample z-interval for a population proportion C A two-sample z-interval for a difference in sample proportions D A two-sample z-interval for a difference in population proportionsThe prevalence of a disease in the general population is 0.2%. A diagnostic test is developed that correctly predicts the disease state of a sick person 90% of the time and of a healthy person 95% of the time. a. Draw the Venn diagram for the problem and indicate the number of people out of 10,000 people total that fall into the diagram's four bins. The bins should be defined by disease state (D+/D¯) and test result (T+/T) where + indicates you have the disease and indicates that you do not. b. What is the probability that a person with a positive test result actually has the disease? c. What is the probability that a person with a negative test result does not have the disease? d. Does the test have practical value for detecting people with the disease and why?(b) Figure Q1(b) shows the data from the survey conducted among teenagers who drive a car on the rural road and their involvement with traffic accidents. Based on the information given: Provide your calculation of the total numbers of teenagers who drive a car on the road. i. ii. Based on your understanding what is the probability of teenagers getting involved in accidents during both day and night times? iii. Interpret the probability of teenagers who were not getting involved in accidents during day time.
- The 98.6 degree standard for human body temperature was derived by a German doctor in 1868. In an attempt to verify his claim, Mackowiak, Wasserman, and Levine22 took temperatures from 148 healthy peopleover a 3-day period. A data set closely matching the one in Mackowiak’s article was derived by Allen Shoemaker, and appears in the Journal of Statistics Education.23 The body temperatures for these 130 individuals are shown in the relative frequency histogram that follows. See Attachment a. Describe the shape of the distribution of temperatures.b. Are there any unusual observations? Can you think of any explanation for these?c. Locate the 98.6-degree standard on the horizontal axis of the graph. Does it appear to be near the center of the distribution?The accompanying table pertains to scheduled commercial carriers for a certain country. The third year was an anomaly. If the anomalous numbers are removed from the data for the third year (4 of the 7 fatal accidents and 261 of the 531 fatalities were anomalous), which of the three measures for fatalities change and what are their new values for each of them? Click the icon to view the commercial carrier data for the country. ... Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Simplify your answer. Type an integer or a decimal. Do not round.) OA. The new median is The mean and mode remain the same. The median and mode remain the same. OB. The new mean is OC. The new mode is D. The mean, the median, and the mode all remain the same. The mean and the median remain the same.Lucas conducted a dihybrid cross in his genetics experiment. He observed 315 flies with gray body and long wings, 108 flies with gray body and miniature wings, 101 flies with ebony body and long wings, and 32 flies with ebony body and miniature wings. Analyse these data using x test to see if (i) they fit a 9:3:3:1 ratio. (ii) the gray : ebony data fit a 3:1 ratio. Table 1: Chi-square table Chi Square Values and Probability Degrees of Freedom P= 0.99 0.95 0.80 0.50 0.20 0.05 0.01 1 0.000157 0.00393 0.0642 0.455 1.642 3.841 6.635 2 0.020 0.103 0.446 1.386 3.219 5.991 9.210 3. 0.115 0.352 1.005 2.366 4.642 7.815 11.345 4 0.297 0.711 1.649 3.357 5.989 9.488 13.277
