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Test the claim about population mean, u, at given level of significance using given sample statistics.
Claim u = 40; st dev = 0.03; Sample statistics: x=39.1, s=3.17, n=71
Standardized test statisctic is ____.
Find out critical value(s). The critical value(s) is/are?
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
What is the value of the population mean? What is the best estimate of this value?
An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40.
The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.
Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90.
Microfracture knee surgery has a 75% chance of success on patients with degenerative knees. The surgery is performed on 5 patients. Find the probability of the surgery being successful on less than 3.
A fair coin was flipped three times and landed heads three times. What is the probability of a head on the next toss?
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 925 hours. A random sample of 39 light bulbs has a mean life of 905 hours with a standard deviation o 55 hours.
What is the probability that the sample mean will be greater than M = 510. In symbols, what is p (M>510)?
What is the purpose of a survey? What are three examples of a survey and what potential purpose could each be used for? How can one work to ensure the participants of a survey will have their responses kept private?
In a test of a gender-selection method, 14 babies are born and 10 of them are girls. Find the number of different possible sequences of genders that are possible when 14 babies are born
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
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