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A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test the supplier's claim that 1% are defective.
True or false: There is not sufficient evidence to warrant rejection of the claim that 1% are defective.
True
False
Find the value of the linear correlation coefficient r.
The paired data consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands):
Cost 9 2 3 4 2 5 9 10
Number 85 52 55 68 67 86 83 73
-0.071
0.708
0.246
0.235
Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
Correlation rule states that if X and Y are correlated, X has caused Y.
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.
Suppose the manufacturers claim is right, determine the probability the mean of sample is 47,840 miles or less?
Which of the following is the correct set of probabilities for X and if a student is selected at random, the probability he or she is either a Junior or a Senior
The ages of the cadets in the sample will form a normal distribution.
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
A very bright student is described as having an IQ that is three standard deviations above the mean. If this student's IQ is reported as a z-score, the z-score would be the following.
An entrepreneur owns two hotels, one in the western region of a certain state and the other in the eastern region. He thinks that the average amount spent by guests for lunch at his Friendly Café-West is less than $34.50
A hypothesis states a difference exists between two populations. Sometimes this is an obvious conclusion because the means will be very different.
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