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A manufacturer of automobile purchases machine bolts from a supplier who claims that no more than 5% of suppliers bolts are defective. From a sample of 400 bolts, it is found that 28 are defective. Is there sufficient evidence to reject the suppliers claim? Use 0.05 1. Identify the parameter(s) 2. Null Hypothesis 3. Alternative Hypothesis 4. Test Statistic 5. Rejection Region 6. conclusion
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
for a distribution of scores x40 corresponds to a z-score of z -1.00 and x 42 corresponds to a z-score of z -.50. what
What is the probability that their average lifetime would be less than 510 hours? Use your calculator to solve this problem and give your answer as a number between 0 and 1, rounded to 3 decimal places.
would this prove that they are exceeding their goal, using α = 0.025?
A researcher want to estimate the mean shoulder height of both male and female bears within 0.25 centimeters. Determine the minimum sample size required to construct a 99% confident interval
The number of passengers arriving at an airport terminal average 1200 each hour. To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wai..
a sample of 400 racing cars showed that 80 of them cost over 700000. what is the 99 confidence interval for the true
What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test?
random variable Y that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to U=3Y+1. Find the probability density function for U.
a government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher
Compute a 5-month moving average forecast for June through January.
Name six virtues and characteristics of problems and hypothesis. Name some tips for identifying and developing formal research problems.
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