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What is the "n" for what statisticians consider a small sample and do we use a z-score or a t-score to estimate parameters for the larger population?
what are examples of the populations parameters we are trying to estimate for sample data?
Give an ending for the below statement.Last week Tom had exams in Statistics and in English. He scored 10 points above the mean on both exams. From this information, you can conclude.
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study and gender differences were also to be investigated. One of the variables measured was the heart rate after..
A sample of 16 patients in a doctors office showed that they had to wait an average of 43 minutes with a standard deviation of 8 minutes before they could see doctor. Provide a 99% confidence interval for the average waiting time for all of the pa..
A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.
Apply the EOQ model to the following quantity discount situation in which D=500 units per year, C0=$40, and the annual holding cost rate is 20%. What order quantity do you recommend?
Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.
A bank wants to get new customers for their credit card. They try two different approaches in their marketing campaign. The first promises a "cash back" reward; the second promises low interest rates. A sample of 500 people are mailed the first br..
A statistics professor would like to determine whether students in the class showed improved performance on the final exam as compared to the midterm examination.
When the underlying average of a time series is very stable and there is no trend, cyclical, or seasonal influences,
Using Non-parametric test, whether there is significant difference in the motor coordination skills.
Which of the following would be most helpful in assessing the practical significance of a test of hypotheses about a proportion?
What assumption tests should be used? A fifth grade science teacher want to know if there is a relationship between final exam scores and overall course points after adjusting for a quiz score.
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