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An automobile battery manufacturer claims their batteries have an average life of 5.2 years with a standard deviation of 0.6 years.
Assuming battery life is normally distributed, the probability a random sample of 16 batteries has an average life greater than 5.5 years is
Unfortunately, the random variable in question is exponentially distributed; the sample size of 10 is considerably smaller than is required for a normal approximation to be valid for the sampling distribution of the sample mean; and therefore no ..
Let Z be a standard normal random variable. Use the calculator provided to determine the value of c such that
A neuropsychologist compare the auditory abilities of blind versus normally sighted rats. He predicted that the visually impaired rats would have better auditory development than normally sighted rats.
Describe a 5-step hypothesis test for two variances for a particular claim related to your work or life environment. You need to state the claim,
How many bad seeds do you expect to get?- What's the standard deviation?- What assumptions did you make about the seeds? Do you think that assumption is warranted? Explain.
We have no idea Regarding the shape of the population distribution. What is the probability that the mean fee for a sample of 30 customers was less than $125?
would this prove that they are exceeding their goal, using = .025?
Three elements are randomly chosen out of the shipment. What is the probability that all three faulty elements will be the ones chosen?
Write down a 16-run design for 10 factors. (b) Give its alias structure. (c) How might you decide which 10 columns to use in an actual design.
Suppose a coin toss turns up 12 heads out of 20 trials. At .05 significance level, can one reject the null hypothesis that the coin toss is fair?
As markets become more and more international, many firms invest in research aimed at determining the maximum possible extent of sales in foreign markets.
Assuming that inspectors' performances are independent of one another, find the mean and standard deviation of the total number of components checked in a shift
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