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The American Automobile Association checks the prices of gasoline before many holiday weekends. Listed below are the self-service prices for a sample of 15 retail outlets during the May 2003 Memorial Day weekend in the Detroit, Michigan, area.
1.44
1.42
1.35
1.39
1.49
1.41
1.46
1.45
1.48
a. What is the arithmetic mean selling price?
b. What is the median selling price?
c. What is the modal selling price?
A portfolio p of consisting 60% of stock X and 40% of stock Y, has a correlation ρpM = 0.62 with the market. What is the portfolio volatility? Statement on the diversification effect.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.
If standard deviation is 50 hours and α is equal to 0.01, what values for mean x will result in rejection of null hypothesis.
Is the sample size large enough to construct a valid confidence interval for the proportion of debit cardholders who have used their card in making purchases over the Internet?
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
Research question: Are the mean crash damages the same for these three vehicles?
On randomly selected day, let X and Y, respectively, be proportions of time that the drive-in and walk-in facilities are in use. Determine the marginal density of X.
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
Determine the coefficient of correlation between the two variables. Interpret the value.
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
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