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In a sample of 51 consumers the average weekly cost of vaping was 152 dollars. Suppose you know that the standard deviation of weekly cost of vaping in the population is 115 dollars. Using a 10% significance level, would you be able to conclude that the average weekly cost of vaping in the population is larger than 130 dollars? Show your work.
Criticize the following definitions in light of the eight rules for lexical definitions:- "Wood" means fibrous, lignified cellulose.
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
Afterward the participants were asked to "choose a number between 1 and 10." Analyze the data with a t test and an effect size index. Write an interpretation.
If a random sample of 250 divorcing couples reveals that 53 of them have great difficulties in splitting their family assets, construct a 90% confidence interval for the proportion of all couples getting divorced who encounter such problems.
If nine managers who recently changed jobs are randomly chosen, what is the probability that Three changed for intellectual challenges.
at a large publishing company the mean age of proofreaders is 36.2 years and the standard deviation is 3.7 years.
In 1990, a total of $488 billion was spent on food and drinks in a particular country. In 2003, the total spent was $868 billion.
question the associated press reports that the mean trading volume for equity and index options contracts was 3.6
What is the probability that the of the 50 reporters will be seated at his/her assigned seat? Give your answer to 2 decimal places.
Find the median income of all the orders. Calculate mean. median and mode from the following frequency distribution of marks at a test in English.
Westberg Electric Company sells electric motors to customers in the Jamestown, New York, area. The monthly trend equation, based on five years of monthly data.
Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
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