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Two different alloys are being considered for making lead-free solder used in the wave soldering process for printed circuit boards. A crucial characteristic of solder is its melting point, which is known to follow a Normal distribution. A study was conducted using a random sample of 21 pieces of solder made from each of the two alloys. In each sample, the temperature at which each of the 21 pieces melted was determined. The mean and standard deviation of the sample for Alloy 1 were x bar 1 = 218.9ºC and s sub 1 = 2.7ºC; for Alloy 2 the results were x bar 2 = 215.5ºC and s sub 2= 3.6ºC. What is the approximate p-value?
A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages On each page, the mean area devoted to display ads was measured (a display ad is a large block of multicolored illustrations, map..
Derive the probability that a receptor is occupied by a ligand using a model which treats the L ligands in solution as distinguishable particles.
Work through a simple regression calculation using intrinsic job satisfaction nd extrinsic job satisfaction. Select thirty data points to use for each group.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? What is the p-value?
assuming that the population is normally distributed construct a 95 confidence interval for the population mean based
Below, explicitly state slope of your trend line and describe what value of slope signifies in terms of this context.
Let A be the event that a student is enrolled in an accounting course, and let S be the event that a student is enrolled in a statistics course.
Which of these variables are discrete and which are continuous random variables?
1.two coins are tossed and the total number of heads is counted. which of the following would be a legitimate
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
Suppose that the probability distribution of a random variable x can be described by the formula. Calculate the variance and standard deviation.
There are 137 tickets in a hat and my name is on 3 of them. If someone draws 20 tickets out of the hat, what is the probability of my name being on one of those 20tickets.
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