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If you had the chance to set up a simple experiment at your workplace to test a hypothesis, would you have your research design focus on group comparison (e.g., t-test), pre-post change (e.g., paired t-test), or correlation between variables (e.g. Pearsons)? Why would you prefer this approach?
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
Assume there are 18 homes in the Quail Creek area and 8 of them have a security system. Five homes are selected at random: What is the probability all five of the selected homes have a security system?
You are having a meeting with the employees of Financial Outsourcing, Inc. During the meeting, you were asked several questions. Give your opinion to the questions.
Obtain the estimated regression function. Plot the estimated regression function and the data. Does a linear regression function appear to give a good fit here?
testing the difference between two means.bull what two assumptions must be met when you are using the z test to test
Create and attach a normal curve to this document with the following elements: the normal curve, a label of the average number of shoppers, and labels for the sample means of 441 and 446 shoppers. Include all the appropriate symbols.
Correlation of partial scores from one administration of one test - construct a frequency distribution table
Calculate the 90% confidence interval for the population mean of health men's pulse (sphygmus) in mountainous area.
boeing has developed a new drilling tool that drills hole for riveting on the 787 wings. the standard deviation of hole
a box contains 10 balls numbered 12...10. two balls are selected at random without replacement.a find the probability
A medical research project examined the relationship between the subject's weight and recovery time from surgical procedure, as shown in the table below.
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