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The accompanying two-way frequency table appears in the article "Marijuana Use in College" (Youth and Society, 1979: 323-334). Each of 445 college students was classified according to both frequency of marijuana use and parental use of alcohol and psychoactive drugs. Does the data suggest that parental usage and student usage are independent in the population from which the sample was drawn?
Formulate the hypotheses that can be used to determine whether the mean of all account balances is significantly different from $1,150
A sample of students were asked to rank their looks compared to the looks of others on a scale from 1 to 10. A 10 means they feel they are more attractive than everyone else while a 1 means they feel they are less attractive than everyone else. Th..
Over the past 20 days (20 shipments), four have been rejected & returned back to company A. Determine if there is a problem with the parts at company A.
Use the following frequency distribution (of SAMPLE DATA)in answering the questions: class 0-10 f=10; class 10-20 f=20; class 20-30 f=40; class 30-40 f=20; class 40-50 f=10. What is the value of the standard deviation
Sample of 1500 voters was taken and the number who are voting yes is recorded. What is the probability that more than 50% of those 1500 vote yes?
Sketch the distributions involved, and (c) explain your answers to someone who has never had a course in statistics.
Give an example using either completing the square or the quadratic formula and explain each step as if you were teaching someone who had never used the method before.
Let X be a random variable of the continuous type that has pdf f(x). If m is the unique median of the distribution of X and b is a real constant, show that E(X - bl) = E(X - ml) + 2 [(b - x)f(x) £lx, provided that the expectations exist.
hypothesis test for two factors anova.nbspnbspnbspnbspnbspnbsp a mail order catalogue company operates with three
Shaver Manufacturing, Inc., offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution
The Central Limit Theorem states that the sampling distribution of means is:
Estimating the individual score using normal distribution and find the minimum SAT score needed to be accepted?
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