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1. Write a brief summary of what you learned in this activity about how features of distributions are related to graphs of the data.
2. Name two variables that have symmetric distributions, two that have distributions skewed to the right, and two that have distributions skewed to the left.
use the appropriate normal distribution to approximate the resulting binomial distribution.the manager of madison
the average salary of a male full professor at a public four-year institution offering classes at the doctoral level is
What are the null and alternative hypotheses?- What are type I and type II errors in this case?- Which type of error is more costly?
Construct the ATI curve for the sampling plan N = 1200, n= 50, c =1. Suppose that the process average nonconforming rate is 3%. Explain the value of ATI for that level of nonconformance.
Now he wants to know if there is a difference between the three formats. Is there?
The average salary of senior managers in the construction industry is $180,000 per year. Suppose we would like to take a sample of senior managers at a newly established company XYZ to see whether the mean annual salary is different from that..
Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.
A histogram of time spent eating & drinking each day is skewed right. Use this result to explain why a large sample size is needed to construct a confidence interval for the mean time spent eating & drinking each day.
q1. a small town has a population of 20000 people. among these 1000 regularly visit a popular local bar. a sample of
Dr Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group four persons were African American, six persons were Hispanic and ..
A psychiatrist would like to determine whether a new medication has any effect on psychotic symptoms. A sample of patients is assessed and then placed on drug therapy for 2 weeks. The severity of their symptoms is assessed again at the end of the tre..
24% of the students in the sample received and A. At the 1% signifiance level, the test hypothesis that more then 20% of the students received and A.
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