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SCCoast, an Internet provider, developed the following frequency distribution on the age of Internet users. Find the mean, median, and the standard deviation.
Age (years)Frequency10 to under 20320 to under 30730 to under 401840 to under 502050 to under 6012
With a 98% level of confidence a company producing street signs wants to make sure the length of their product is meeting quality standards.
Design a Linear programming problem for the flair Furniture Company and find the combination of tables and chairs that the company must produce to maximize profits.
Test the equality of the means of three populations.
Mary claims that the range, standard deviation and variance are all measures of dispersion. John adds to Mary's claim by stating that the coefficient of variation is a measure of relative dispersion.
The average age of the women was 45.582 with a standard deviation of 5.143. He uses this information to calculate a 95% confidence interval for the differnce in means, (-11.41, -5.422). The best interpretation of this interval is which of the foll..
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?
predicting winning percentage for the nflthe national football league nfl records a variety of performance data for
Construct a 95% con dence interval for the true mean. Based on the con dence interval, is the true mean likely to be 15g and find the minimum weight of the heaviest 5% of cans of soup produced.
What is the correlation between x3 and x2 and what is the pdf of x?
Manufacturer of mole and gopher poison has experienced the following monthly demand for an environmentally sound pesticide poison. Using a Average method, what would the forecast have been for July?
The mean weight of newborn babies in a Long Island Community is 7.5 lbs with a standard deviation of 1.4 lbs. What is the probability that a random sample of 49 babies has a sample mean weight of at least 7.2lbs?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
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