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A bottling company fills bottles with a mean of 500 mL of liquid, with a standard deviation of 2 mL. Quality control randomly samples 20 bottles at a time. Consider the mean volume of liquid in the sample bottles. What is the mean of the sampling distribution of this sample mean?
Scores on the ACT test have a mean of 21.1 and a standard deviation of 4.8. which is relatively better: a score of 1840 on he SAT or a score of 26.0 on the ACT test? why?
One component of the Drug Court program is frequent random drug testing for a variety of drugs – THC, Meth, Cocaine (crack or powder), Opiates (painkillers), Barbiturates, Benzodiazapines (Xanax), and Alcohol.
A researcher collected sample data for 17 women ages 18 to 24 . The sample had a mean serum cholesterol level (measured in mg/100 mL) of 188.8 , with a standard deviation of 5.5.
suppose that a certain college class contains 65 students of these 35 are seniors 37 are economic majors and 7 are
a real estate company wants to study the relationship between house sales prices and some important predictors of sales
By using the maximax criterion, what decision should be made by the decision maker?
in 2009 the number of feral quaker parrots living in austin was 250. in 1992 there were only 15 feral quaker parrots.
impurities in the batch of final product of a chemical process often reflect a serious problem. from considerable plant
Formulate the appropriate testing hypothesis problem and carry out the test if a = 0.05.
If 49 applicants are randomly chosen, what is the probability that they will have a rating between 230 and 260? Round z scores to two decimal places.
Suppose that an IQ test was given to a large group of persons, the scores are assumed to be from a normally distributed population, that mean = 100 and s (standard deviation) = 15.
Assuming for a moment that 35% of all Ralph's customers have a discount card, what is the probability of getting a sample proportion at least this big?
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