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A sample of 1300 computer chips revealed that 58% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 61% of the chips do not fail in the first 1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that do not fail is different from the stated percentage. Find the value of the test statistic. Round your answer to two decimal places.
mcneese and klein 1991 looked at the average particle size. specifications give the standard deviation of 2 microns. a
(a) How many atoms are there in the cluster. (b) Estimate the volume of the cluster on the assumption that the typical distance between atoms is approximately 0.4 nm. (c) Estimate the diameter of the cluster by treating it as a sphere.
Should the hypothesis be accepted at the 1% level of significance that the population means are the same for each (a) Octane of gasoline? (b) Type of car?Table Miles per Gallon for Each of 4 Octanes
calculate the samplenbspcovariancenbspbetween two variables x and y using the formulas described in lecture or
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics?
consider two values r 0.08 and r ?0.58. describe them in relationship to each other. describe the clinical importance
1.a restaurant monitors its customers complaints. here are the percent of customers with the following complaintswith
What is the probability of flipping a coin 6 times and getting 4 or more heads?
The following table contains t0 new sub- oups of thickness data. Plot this data on the control charts from (a) based on the new subgroup size. Is the process in statistical control?
control chart for x bar is maintained on a quality characteristic which is normally distributed.the sample size is n4.
Suppose that network breakdowns occur randomly and independently of each other on an average rate of three per month. (a) What is the probability that there will be just one network breakdown during December? Interpret.
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