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Design an imaginary study or discuss an actual study you've read about that has an experimental or quasi-experimental design that used or would use t-tests or ANOVAs in the data analysis. Briefly tell us the nuts and bolts of the study and then get to the discussion of the following:
What the null hypothesis is in your experiment?
What is the level of significance you chose in your experiment and what did you learn because the analysis of the data showed that the divergence from the null hypothesis was statistically significant?
Describe the statistical method you used in the analysis of the data, either t-tests or ANOVAs. Discuss why your choice was appropriate for your study.
Increasing the confidence-interval level from .95 to .99
Calculate the correlation coefficient and prediction equation.
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
Consider the following stemplot. The mean of the data represented in this stemplot ?
Determine whether the sampling method is independent or dependent for the following example. A researcher wants to know whether the newly issued "state" quarters have a mean weight that is different from "traditional" quarters.
When coaching or training athletes, the tests employed to predict performance or determine training methods incorporate statistical methods. Why are these methods so effective?
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
The amount of time the university professors devote to their jobs per week is normally distributed with a mean of 52 hours and a standard deviation of 6 hours.
If we know that the length of time it takes a college student to find a parking spot in library parking lot follows a normal distribution with mean of 3.5 minutes and a standard deviation of 1 minute, determine the probability that a randomly sele..
The exercise problem the following information to figure prevalence and incidence rate:
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