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A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the HDL cholesterol within 3 points with 99% confidence assuming α= 18.9? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required?
Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component.
Is there a significant difference between the lengths of front and rear legs of a certain breed of horses. The results of the measurements in inches made in 10 of these animals are:
1. suppose the average thread-life of a certain brand of tire is 42000 miles and that this mileage follows the
a random sample of 200 observations shows that there are 36 sucessess. can we conclude at the 1 level of significance
Construct a stem-and leaf display for the data set? Construct a box plot for the data set? Draw conclusions about the data (e.g. are there any outliers, etc, etc.).
A city official has stated that 20% of the items sold by pawn shops within the city have been stolen. Ralph has just purchased 4 items from one of the city's pawn shops.
the diameter of ball bearings produced in a manufacturing process can be explained using a uniformprobability
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected.
Use Friedman test to find out whether there is evidence for significant difference between two population variance. Use .05 level of significance.
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
describe the role and importance of listening skills in cross-cultural communication. how can these skills be learned
find the probability density function for the t-distribution with 1 degree of freedom. hint in math 380 you calculated
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