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Only 2% of a large population of 100-ohm gold-band resisters have resistance that exceed 105 ohms. What is the probability that the proportion of resisters with resistance exceeding 105 ohms in a random sample of 400 will be less than 3%?
Carry out a significance test for the hypothesis that the two tests have the same population mean. Give the P-value and state your conclusions.
If standard deviation is 50 hours and α is equal to 0.01, what values for mean x will result in rejection of null hypothesis.
What is the probability that the person will be hospitalized for a drug-related problem, given that the person has received the PMI sheet?
The Bottom Line Gift Boutique has been the target of many shoplifters in the past. What is the probability that the shoplifter is a first time offender, given that the shoplifter is a male?
Assume that your students are a sample of all fourth graders in your state and you can use your student data to test some ideas. What is the major problem with your assumption.
Linear Optimization.
The sample has a mean of 4.8 years and a standard deviation of 2.2 years. Use a .05 significance level to test the claim that the mean time for all college students is greater than 4.5 years.
A company has two different processes that make credit cards. Suspecting that machine B has a higher variability than machine A the manager orders a test to be run. The following data was collected:
Calculate trial control limits for the two charts and on the assumption that the R chart is in control, estimate the process standard deviation.
Explain briefly and in nontechnical language what "a significant difference (P
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores (a) above .10, (b) below 10, (c) above .20, (d) below .20, (e) above 1.10, (f) below 1.10, (g) above -.10, (h)..
Finding the probability of each event in a group of events of different possibility
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