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Question: Manufacturing and Product Development A manufactured glass rod is tested for the stress required for fracture. Experiments suggest that a flame-polished rod has a higher mean fracture stress than a rod with an abraded surface. In both cases, the variance in stress is designed to be at most 324 MPa2. A random sample of 12 polished glass rods was obtained, and the fracture stress for each was measured. The sample standard deviation in fracture stress was s = 21.56. Is there any evidence to refute the manufacturer's claim? Assume the underlying distribution is normal and use a = 0.01.
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
What's the probability it has a cosmetic defect but no functional defect? If you notice a dent on a new car, what's the probability it has a functional defect?
Look at the calcium data as paired. Perform a test to determine the p-value (two-sided) for the decrease. State the null and alternative hypothesis. Calculate a 95% confidence interval for the decrease. Show the steps you used to reach the conclusion..
question the scores on an exam are normally distributed with micro 30 and s 7. show your working.a what percent of
What is the net income of SouthCo if unit sales are twice the break-even point for a given month?
Final exams. Anna, a language major, took final exams in both French and Spanish and scored 83 on each. Her roommate Megan, also taking both courses.
The manager for Select-a-Seat, a company that sells tickets to athletic games, concerts, and other events, has determined that the number of people arriving at the Broadway location on a typical day is Poisson distributed with a mean of 12 per hou..
(K-Traveling Salesmen Problem) Consider the version of the traveling salesman problem where there are K salesmen that start at city 1, return to city 1, and collectively must visit all other cities exactly once. Transform the problem into an ordin..
A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special".
Random sample of 150 viewers last night revealed 53 watched news on WNAE, 64 watched on WRRN, and 33 on WSPD. At .05 significance level, is there a difference in proportion of viewers watching three channels?
given the following estimates of various components of genetic variationva 90 vd 50 vi 35 ve 125what is
Are based on a report of a Field poll printed in the Sacramento Bee on July 7, 2000 (Dan Smith, p. A4), with the headline, "Ratings Up for Boxer, Feinstein.
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