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Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)? Then state the null and alternative hypothesis for a problem.
The IQ's of two different groups of 24 children were measured to see if there was a difference between the mean IQ scores of the groups.
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme ..
Find the probability that the driver was intoxicated or the pedestrian was not intoxicated?
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
If the confidence interval limits do not include age below 20 does it mean that motor cyclists under the age of 20 rarely die in crashes?
A sample of 10 urgent and non-urgent patients was conducted to determine average wait time. The hospital wants to be sure that urgent patients do not wait as long as non-urgent patients. The following hypotheses have been formulated.
When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100
Solution throughout graphical method. Produced by a company linear programming model is used to describe the production schedule.
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
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