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Research at the University of Toledo indicates that 50 percent of the students change their major area of study after their first year in a program. A random sample of 100 students in the College of Business revealed that 48 had changed their major area of study after their first year of the program. Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
Formulate a linear programming model that can be used to determine the number of units each model that should be produced in order to maximize the total contribution to profit
Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children.
Assume that another counselor decided to extend the aforementioned study by collecting data on 14 children. His study yielded the following results:
Suppose you conduct survey asking people if they support something or if they like some product or if they watch some TV-show.
What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?
What is the purpose for post tests? To determine how much difference exists between the treatments.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
From past experience, a server at a restaurant knows that her tips follow a right-skewed distribution with mean $6 and standard deviation $4.
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year.
According to the patient's history and physical examination. What are the chances of herniation if the MRI is positive?
Is the gender distribution for theater goers significantly different from the distribution for the general college? Test at the .05 level of significance.
Compute standard normal z-score corresponding to value of x = 23. e. Determine P(x 23). G. Determine P(16
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