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At a community college it is known that the grade point average (GPA) of all students has a distribution which is both mound shaped and symmetric. The mean of the distribution is 2.89 with a standard deviation of 0.37. It has been decided by the Faculty Senate that all students with GPAs in the top 16% will graduate with honors. What is the minimum GPA that qualifies a student to graduate with honors?
In your research, you may find that you must compare the means of two sample populations related to one particular variable. For example, you may have population samples from two ethnic groups that you wish to compare against income level. In these c..
A lab test is 95% eff ective in detecting a disease. The test gives a false positive (reports the patient has disease when they do not) for 1 % of the healthy population tested.
Compute the power of the previous test if the true proportion of adults having access to the internet in the population is 41%. What is the power if the true proportion is 42%? 43%?
In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together?
Critically discuss some concepts behind variance analysis? Why is it important to test for variances in your data? Explain. How is variance analysis used in health care administration?
Compare two models. Model #1 has an r-squared of .25 and an adjusted r-squared of .10. Model #2 has an r-squared of .20 and an adjusted r-squared of .14. Given this information, what model should you use?
Given the following data, 1) how do you make Excel create a scatter diagram for you? 2) If you were to draw a line through the points, how straight would the line be?
The null hypothesis is the alternative is Use the given sample data to find out the P-value for the hypothesis test. Provide an interpretation of the P-value.
a standard deviation of 5 miles per gallon. At α=0.05, can you reject the auto maker's claim that the mean gas mileage of its luxury sedan is at least 25 miles per gallon?
Using probability: How can you use probability to improve your chances of winning at a casino. Provide specific examples using concepts learned in this module
An experimental surgical procedure is being studied as an alternative to the old method. Both methods are considered safe. Five surgeons perform the operation on two patients matched by age, sex, and other relevant factors
The best we can do is to use one-way ANOVA and make sure to randomize the treatments to the experiment units. Why is such a randomization important?
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