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A batch of 25 injection-molded parts contains five that have suffered excessive shrinkage. If two parts are selected at random, and without replacement, what is the probability that the second part selected is one with excessive shrinkage?
In a random sample of 400 items, 88 are defective. If the null hypothesis is that 20% of the items in the population are defective, what is the value of ZSTAT?
write a matlab program that can simulate picking skittles from a bag 1 at a time without replacement. and shows the
Determine the point estimate of difference between mean fuel efficiency rating for midsize cars and large cars? Calculate p-value for the hypothesis test.
Construct a 99% confidence interval estimate of the proportion of all senior executives who have that same opinion. Is it possible that exactly half of all senior executives believe that the most common job interview mistake.
What decision should be made according to the maximax decision rule and what decision should be made according to the minimax regret decision rule?
Mean 504 and standard deviation 111. A sample of size 1000 is obtained from this population. What is the mean of the sampling distribution of the sample mean?
The average cost per night of a hotel room in New York City is $273 (SmartMoney, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard deviation is $65.
write an accurate concluding statement for the following hypothesis tests.a you claim that the mean volume of all 12
a random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is
Compute a 95% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24 and 59. Change the number from 59 to 24 and recalculate the confidence interval.
Let X be a normal distributed random Variable with u=100 and o=10. the probability that X is between 70 and 100 is:
Compute the proportion p (hat) for your sample Show your computation. Find a 95% confidence interval for p. What is the margin of error in this confidence interval? What is the meaning of this interval with respect to your data and project?
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