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Suppose a stock analyst wants to determine whether there is a difference in the mean rate of returns for three types of stock - utility, retail, and banking. Which parametric test would you recommend him/her to use - Z-test, t-test, F-test, ANOVA-one way design or ANOVA-two design? Why?
Evaluate the factor effects. Find out which factors are significant in explaining yield.
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
Define the Linear programming problem (LPP)
A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter.
What is the purpose of a survey? What are three examples of a survey and what potential purpose could each be used for? How can one work to ensure the participants of a survey will have their responses kept private?
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
Testing for Population mean - Can the difference in average educational level between the sample and the nation be explained by chance variation?
Construct a scatterplot for the (x, y) values below, and answer the following questions. What would be the slope of this regression line?
The weight of an almond is normally distributed with mean 0.05 ounce and standard deviation of 0.015 ounce. Find the probability that a package of 100 almonds will weigh between 4.3 and 5.3 ounces.
What does the coefficient of determination tell you about the variation in attendance and the variation in the number of exhibitors?
The sensitivity of a test is the probability that a person having the disease will test positive (indicating the person has the disease, i.e., it's the probability the test will pick up the fact that a person has the disease).
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