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MEAN DIAMETER OF BALL BEARINGS
A manufacturer of "low precision" 10 mm diameter ball bearings periodically takes samples and measures them to con?rm that the manu- facturing process is still on target. A random sample of 20 ball bearings resulted in diameter measurements with an average of x¯ = 9.86 mm, and a standard deviation s = 1.01 mm. Postulating that the random sample X1 , X2 ,..., X20 is from a Gaussian distribution with μ = 10, ?nd the probability that any sample mean, X¯ , will fall to either side of the postulated mean by the observed amount or more, by chance alone. i.e. P (X¯ ≤ 9.86) or P (X¯ ≥ 10.14).
Given that the battery still works at 20, 000 km, what is the probability it lasts for at least another 40, 000km?
the best leadership theories to describe and explain effective leadership in teams with interactive members
A large medical center's oncology program reported in increased # of cases of pancreatic cancer during a certain month.
we write the numbers 1 -10 on separate pieces of paper and put them into a box. a number is drawn from the box. find
the f-distribution is defined as thea. distribution of all possible values of f regardless of whether h0 is true or
Rrepresented as a table or a graph, both shown below. The random variable xi represents the number of complaints, and p(xi) is the probability of receiving xi complaints.
State the hypotheses for a right-tailed test.
a manufacturer of sports drinks has randomly sampled 198 men and 202 women. each sampled participant was asked to taste
How can you determine if two vectors are dependent or independent and Is division of a vector by another vector defined?
Determine if the values are uniformly distributed. The researcher is using the chi-square goodness-of-fit test for this analysis.
In 2006 the U.S. Internal Revenue Service (IRS) received 132,275,830 individual tax returns (The 2008 New York Times Almanac). The actual number of each type of individual return received by the IRS in 2006 is given below:
1. compute the percentage of the normal curve located at or above each of the following z values.a. 1.50b. -1.50c.
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