Observed Tensile Strenght Weight Percentage Ib / in TOTALS AVERAGES Cotton 1 3 15 8 8 34 58 11.6 20 13 11 11 35 70 14 25 15 18 18 20 71 14.2 30 22 25 22 19 88 17.6 35 24 25 26 15 90 18 y. = 377 y = 15.08 O 1206.55 1602 180.8 O None of the Above 2.
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What is the value for sum of squares between treatment?
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- Much concern has been expressed regarding the practice of using nitrates as meat preservatives. In one study involving possible effects of these chemicals, bacteria cultures were grown in a medium containing nitrates. The rate of uptake of radio-labeled amino acid (in dpm, disintegrations per minute) was then determined for each culture, yielding the following observations. 7,255 6,875 9,637 6,863 9,098 5,846 8,954 7,979 7,068 7,498 7,882 8,179 7,528 8,728 7,469 Suppose that it is known that the mean rate of uptake for cultures without nitrates is 8,000. Do the data suggest that the addition of nitrates results in a decrease in the mean rate of uptake? Test the appropriate hypotheses using a significance level of 0.10. Find the test statistic and P-value. (Use technology to calculate the P-value. Round your test statistic to two decimal places and your P-value to three decimal places.) t= P-value= State your conclusion. Reject H0. We have convincing evidence that the mean rate of…Calculate the average values of the Cp and Cpk capabil-ity indices for the BOD data , assuming that LSL=5 mg/L and USL=35 mg/L. Do these val-ues of the indices indicate that the process performance is satisfactory?The article “Effect of Internal Gas Pressure on the Com- pression Strength of Beverage Cans and Plastic Bottles” (J. of Testing and Evaluation, 1993: 129–131) includes the accompanying data on compression strength (lb) for a sample of 12-oz aluminum cans filled with strawberry drink and another sample filled with cola. Does the data suggest that the extra carbonation of cola results in a higher average compression strength? Base your answer on a P-value. What assumptions are necessary for your analysis? ( use ? = 0.01 )
- An assemb ly-line worker at Joseph Milner'sFabrication Shop inserts Pa rt A into Part B. A time study wasconducted and produced the fo llowing results in seconds: 8.4, 8.6,8.3, 8.5, 8.7, 8.5. What is the average cycle time?A researcher interested in exercise endurance in older adults with coronary heart disease measured the endurance of 450 older adults during an exercise routine on a scale of 0-10. He obtained a mean (SD) rating of 6.2 (3.4). Compute the 85% C. I: _____________.Find the area under the standard normal distribution curve to the right of =z1.87
- Find the area under the normal curve between Z-scores of -0.57 and -1.42 -1.5Find the area to the right of the z-score 1.56 and the left the z-score 1.76 under the standard normal curveA metal company is supplying its product to a manufacturer of washing appliances that has specified that the outside diameter be 0.255 + 0.028 inch. Fifty samples of n = 5 units show that the process is in good statistical control, the diameters are normally distributed, and that μx and σx for the process are 0.260 and 0.02 inch, respectively. a) What percent of the product made by this process is within the specifications? Answer in 2 decimal placesb) If the process variability was reduced by about half (i.e., σx changed to 0.01 inch), what percent of the product made by this process is within the specifications? Answer in 2 decimal places.
- Integrate the appropriate chi-square density to findthe probability that the variance of a random sample ofsize 5 from a normal population with σ2 = 25 will fallbetween 20 and 30.the area under the standard normal curve to the right of z = -2.4.In response to concerns about nutritional contents of fast foods, McDonald’s announced that it would use a new cooking oil for its french fries that would decrease substantially trans fatty acid levels and increase the amount of more beneficial poly-unsaturated fat. The company claimed that 97 out of 100 people cannot detect a difference in taste between the new and old oils. Assuming that this figure is correct (as a long-run proportion). Let X denote the number of individuals who can taste the difference between the two oils in a random sample of 1000 individuals who have purchased fries at McDonald’s. If it turns out that 65 individuals in the sample can taste the difference between the two oils, would you question McDonald’s claim? Explain why or why not.