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A study of net sales of the sample of small corporations revealed that mean net sales is $2.1 million, median $2.4 million, modal sales $2.6 million and standard deviation of distribution is $500,000. Determine the Pearson's coefficient of skewness?
A.-9.1B.+6.3C.-3.9D.+2.4E.None of the above
Assume that a simple random sample is selected from a normally distributed population, use eith the P-value method or the tradiitonal method of testing hypotheses.
Your company builds roads, bridges, schools and other multi-million dollar public construction projects. Competitive bids are made for the contracts to undertake these projects. For each project there are three costs:
A sample of 60 night shift workers showed that the mean number of units produced was 351. At the .05 significance level, is the number of units produced on the night shift larger?
Critically discuss the mean number of children per household for these families? Round your answer to at least one decimal place.
How does a linear regression allow us to better estimate trends, costs, and other factors in complex situations?
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
Normally distributed with the mean income of $30,000 and standard deviation of $3,000. Determine the income which separates top 25% from lower 75% of incomes?
Using the menu systems, request descriptive statistics (mean, s.d. and variance) for both your original variables
What is the value of the mean square for error (the "within groups" mean square that would be reported in the ANOVA test, and what is the value of the mean square for treatments (the "between groups" mean sqaure) that would be reported in the ANOVA ..
Estimating the combined mean values for the given data - find the mean for the combined sample
What is the 95% one-sided confidence interval for the average worker? What is the 95% predicted dose for a 95% one-sided confidence interval?
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