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Tell whether the shape of each of these population distributions would be leftskewed/low outliers, right-skewed/high outliers, fairly symmetric but non-normal, or approximately normal:
a. Age of people who made their first visit to a dentist in a particular year
b. Number of fillings for U.S. college students
c. Length of adults' incisor teeth d. Number of teeth (their own) retained by Americans in their sixties
What can you conclude based on the results of an American Express on-line survey that reported 355 of 546 business travelers using a laptop computer on overnight business trips ? What is the p-value of the test?
1. a multiple regression line was calculated in which x1 was a students grade point average and x2 was a students age.
If you learn that your score on an exam was 80 and the mean was 70, would you be more satisfied if the standard deviation was 5 or if it was 15? Explain.
Suppose three sample means came from a population with µ = 100 and a fourth from a population with a smaller mean, µ = 50. Will the between-treatments estimate.
an advocacy group is investigating whether gender has an effect on job category in large investment firms. given the
What can R2adj do if we add another variable to a regression equation? What can R2 do if we add another variable?
Suppose 80% of kids who visit a doctor have a fever, and 20% of kids with a fever have a sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?
(a) If F is the exponential distribution with rate λ, which, if any, of the processes {Xn}, {Yn} is a Markov chain? (b) If G is the exponential distribution with rate μ, which, if any, of the processes {Xn}, {Yn} is a Markov chain? (c) Give the trans..
sports fans tune to a local sports talk radio station according to a poisson process with the rate of three fans every
A coin is tossed four times. Find the mean, variance, and standard deviations of the number of heads that will be obtained.
discuss the various sampling methods we might use in determining which items to include in a
Write a statistical null and alternate hypothesis and draw a conclusion about the relative safety of the three types of seats.
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