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According to the Center for Disease Control website, in 2011 not less than 18% of high school students have smoked a cigarette. An Introduction to Statistics class in Davies County, KY conducted a hypothesis test at the local high school (a medium sized-approximately 1,200 students-small city demographic) to determine if the local high school's percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the 150 students surveyed, 82 have smoked. Use a significance level of 0.07 and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.
Students will write a report (APA format) describing a research study they design in their area of study ( My area of study Medicine). This report will include the introduction, Participants/sampling method, procedures, data analysis (using one of th..
Customers arrive at a queue according to a Poisson process with an average arrival rate of 4 per hour. (a) Find the probability of exactly three arrivals in 1 hour. (b) Find the probability of at least three arrivals in 2 hours.
the hit-and-miss manufacturing company produces items that have a probabilitypof being defective. these items are
An estimate of the standard deviation of the proportion of carbon monoxide is 0.25. Find a variable sampling plan and explain its operation.
Please list and discuss regression statistics and explain the different variables that are measured by these statistics? Can you provide examples
The average on an exam is 75 and the standard deviation is 17. If the instructor assigned grades based on the Normal distribution what percentage of students will make A's and what percentage will make B;s in teh exam. Assume standard cut-off for ..
Define a proper fraction, improper fraction, and a mixed number. Why may we want to express a number as a mixed number rather than as an improper fraction?
question a bag contains a total of 20 batteries of which six are defective. selecting two at random without replacement
Major hirings in retail in Britain are as follows: 9,000 at Safeway; 5,000 at Boots;.- What is the probability that a randomly selected new hire from these was hired by Marks and Spencer?
A random sample of 70 printers discovered that 20 of them were being used in small businesses. Find the 99% limit for the population proportion of printers that are used in small businesses.
When writing about the probability that it will rain in Boston on July 4 of next year, a newspaper reporter states that the probability is ½, because either it will rain or it will not.
a) What is average number of trucks (to the nearest 0.1 trucks) in the unloading system? b) What is average time per truck (to the nearest 0.1 minutes) in the system?
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