An experiment is designed to determine the effect of four different types of tips in a hardness tester on the observed hardness of a metal alloy. Four specimens of the alloy were obtained, and each tip was tested once on each specimen, producing the following data: Specimen Туре of Tip 1 3 4 9,3 9,4 9,2 9,7 9,4 9,3 9,4 9,6 9,6 9,8 9,5 10 9,9 3 9,7 10,2 10 What is your conclusion about this test at 0.05 level of significance? O a. There is no difference between four specimens of the alloy. O b. At least one specimens of the alloy is different. 685O

An experiment is designed to determine the effect of four different types of tips in a hardness tester on the observed hardness of a metal alloy. Four specimens of the alloy were obtained, and each tip was tested once on each specimen, producing the following data: Specimen Туре of Tip 1 3 4 9,3 9,4 9,2 9,7 9,4 9,3 9,4 9,6 9,6 9,8 9,5 10 9,9 3 9,7 10,2 10 What is your conclusion about this test at 0.05 level of significance? O a. There is no difference between four specimens of the alloy. O b. At least one specimens of the alloy is different. 685O

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter29: Tolerance, Clearance, And Interference

Section: Chapter Questions

Problem 16A: Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector...

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Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector measures 10 spacers and records the following thicknesses: 0.372" 0.376" 0.379" 0.375" 0.370" 0.373" 0.377" 0.378" 0.371" 0.380" Which spacers are defective (above the maximum limit or below the minimum limit)? All dimensions are in inches.
An abrasion test was performed using n = 14 moulded ceramic pieces. The following are the test results, where for the i-th piece, the result of the test was recorded (one of Survived, Broken). The data also gives Xi, the porosity index of the piece, which is a numerical quantity: (Survived,8), (Broken,16), (Broken,19), (Survived,26), (Survived,49), (Survived,54), (Survived,66), (Survived,79), (Survived,102), (Broken,111), (Survived,114), (Broken,151), (Survived,163), (Broken,199) We want to study the resistance of pieces to abrasion as function of porosity. To this end, consider the following logistic regression model, log πi 1/727 ) = B₁ + B₁x₁₂ πi where the observations follow the distribution Y; Bernoulli(;). A data value y; = 1 indicates that the piece survived the test and yi 0 indicates that the piece broke. Fit this model in R using the function glm (). Examine your output and then answer the following questions. = A) What is the value of Bo? B) If the porosity of a piece was…
The chi-square test can only be used when we have:a. Actual frequencies (integer numbers)b. Percentagesc. Proportionsd. Meanse. All of the above 4. The chi-square test is used to determine relationships between two or more:a. Nominal variablesb. Numerical variablesc. Both nominal and numerical variablesd. None of the above
A sample of blood pressure measurements is taken for a group of adults, and those values (mm Hg) are listed below. The values are matched so that 10 subjects each have a systolic and diastolic measurement. Find the coefficient of variation for each of the two samples;then compare the variation. a. The coefficient of variation for the systolic measurements is (Type an integer or decimal rounded to one decimal place as needed.) b. The coefficient of variation for the diastolic measurements is (Type an integer or decimal rounded to one decimal place as needed.)
The toll plaza on Route 1 in Dover has four tollbooths open to all vehicles. Ms. Timlin conducted a chi-square goodness of fit test to see if all of the booths are used in equally. A chi-square value of 23.4 was calculated, resulting in a p-value of 0.006. Which of the following is correct? a. There is sufficient evidence to suggest that the tollbooths are not used in equal proportions. Selected:b. There is sufficient evidence to suggest that the tollbooths are used in equal proportions.This answer is incorrect. c. The tollbooths are used in equal proportions. d. There is insufficient evidence to suggest that the tollbooths are used in equal proportions. e. There is insufficient evidence to suggest that the tollbooths are not used in equal proportions.
In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states: Nickel Charge Proportions Found 0 0.17 +2 0.34 +3 0.33 +4 0.5-0.34 Determine the mean of the nickel charge. Please enter the answer to 2 decimal places.
Coal is carried from a mine in West Virginia to a power plan in New York in hopper cars on a long train. Suppose the weight of the coal in one car was less than 74.5 tons. Would that fact make you suspect that the loader had slipped out adjustment? Suppose the weight of the coal cars selected at random had an average x bar of less than 74.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment why?
Find the raw score which corresponds to z=1.6?
To compare the effects of four different chemicals in producing water restance in textiles, a strip of material randomply selected from a bolf of chemical was cut ito four pieces were randomply assigned to receive an application of one of the chemicals A, B, C, or D. Low readings indicate low moisture penetration. Refer to the table below. Is there a significant difference among the four chemicals? Write the P-value in terms of the type of chemicals. Use 3 decimal places in your final answer. Write zero before the decimal point if the answer is less than one. Bolt Samples 1 2 3 Chemical 10.1 12.2 11.9 A Chemical 11.4 12.9 12.7 В Chemical 9.9 12.3 11.4 C Chemical 12.1 13.4 12.9
Listed below are body temperatures in F from seven different subjects measure at 8 am and again at 12 am
Suppose the lengths of human pregnancies are normally distributed with µ = 266 days and o= 16 days. Complete parts (a) and (b) below. (Type integers or decimals.) A. The proportion of human pregnancies that last less than B. The proportion of human pregnancies that last more than days is days is Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts less than B. The probability that a randomly selected human pregnancy lasts more than (b) The figure to the right represents the normal curve with µ = 266 days and o = 16 days. The area between x = 280 and x = 295 is 0.1558. Provide two interpretations of this area. days is days is Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or…
A researcher wants to determine the sensitivity of mammograms to determine how effective they are at diagnosing women who have breast cancer. Assume the researcher obtained the above results from a study, calculate and interpret the sensitivity of mammograms for detecting breast cancer. Frequency of Breast Cancer Cases Frequency of Non-Cancer Cases Frequency of Individuals Who Screened Positive 17 5 Frequency of Individuals Who Screened Negative 8 77