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An instructor in a Statistics course teaches in two classes: Class A and Class B. Class A has 16 students while class B has 25 students. On the same examination, although there was no significant difference in the mean grades, class A had a standard deviation of the grades of 9 while class B had a standard deviation of the grades of 12.
Can we conclude at a level of confidence of (a) 0.95 and (b) 0.90 that the variability of class A is greater than that of class B ? (c) What is the p-value of the test?
What is the probability that at least 8 of the next 15 errors are due to operator errors? What is the probability that no more than 3/10 failures are due to operators?
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
What is the difference between strong positive and strong negative correlation? Is there value in a strong negative correlation? If so, what? In your answer provide examples from your life.
Dogs were trained with urine samples from bladder cancer patients and people from a control group who did not have bladder cancer.
Students in a statistics class at a large state university were given the survey in which one question asked was age (in years); one student was a retired person, and her age was an "outlier".
Findout the probability value for normal distribution. Illustrate the weight of football players is normally distributed with a mean of 200 pounds also a standard deviation of 25 pounds.
Research the topic of Job Satisfaction and provide a 1 page write-up of the research highlighting where statistical analysis is being used and why it's used.
Based on your analysis, how is the new bottling process working?
Many newspapers, when reporting results of political polls, say that 'with 95% confidence, the results are in error by no more than ±3 percentage points'.
The dean of students believes that teh costs are greater this semester. What is the test value for this hypothesis?
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
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