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1) In research we often rely on the 68-95-99.7 rule. Discuss how this can be applied to make statements about the number of data values below 1,2, or 3 standard deviations from the mean. Give an example of application of this rule.
2) In a research study, what does statistically significant mean? How are decisions made on data based on significance? What do you do with data that is not significantly different?
In terms of the standard scores for both sections, the score of which section was better? What are the z-scores for both sections?
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
At a recent meeting of educational researchers comparison were made between the type of college freshmen attend and the numbers who drop out.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim.
During the 10-month period during which these six exposures were detected, a total of 2,316 general anesthetics using isoflurane or desflurane were delivered in operating rooms monitored by mass spectrometry.
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
Which of the following terms describes the overall long-term tendency of a time series?
Identify the null and alternative hypothesis, test statistics, p-value or critical value(s), conclusion about the null hypotesis and final conclusion that address the original claim.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Determine a 95% confidence interval for true mean cost to repair this type of car.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
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