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The number of bacteria in saliva samples was determined by collecting the saliva, making serial dilutions, and inoculating nutrient agar by the pour plate method. The plates were incubated aerobically for 48 hours at 37C.Bacteria per ml SalivaBefore Using After Using Mouthwash MouthwashMouthwash 1 13.1 x 10^6 10.9 x 10^6Mouthwash 2 11.7 x 10^6 14.2 x 10^5Mouthwash 3 9.3 x 10^5 7.7 x 10^5What can you conclude from these data? Did all the bacteria present in each saliva sample grow?
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
At the time she was hired as a server at the Grumney Family restaurant, Beth Brigden was told, "You can average more than $20 a day in tips.
Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?
Use the interaction plot to argue that the new design is less sensitive to changes in environmental conditions (temperature and humidity). What limitations apply to this argument?
Let x be N(µ,σ2 ) and consider the transformation x=log(y) or equivalently y=exp(x). Find the mean and the variance of y by first determining E(exp(x)) and E[(exp(x)^2 ], by using the moment generating function of x.
The population mean height of a basketball player is 220 cm with a standard deviation of 20 cm. In a sample of 49 basketball players, what is the probability of getting a sample mean height of 215 cm or more?
Critically illustrate out the limitations of seasonal forecasting? Provide examples.
According to Central Limit Theorem, how big of sample is essential to be sure sampling distribution of sample means is normally distributed.
Are you doubtful of any of these data points? if so why does there show to be a linear relation between degree of stenosis and nuber of reactive nuclei?
A professor in the accounting department of a business school claims that there is much more variability in the final exam scores of students taking the introductory accounting course who are not majoring in accounting than for students taking the..
The heights of 10 sixth graders are listed in inches: {53, 61, 54, 60, 58, 62, 55, 58, 59, 56}. Find the mean, median, mode, sample variance, and range.
Calculate the t-test statistic by hand. I don't understand steps to solve this problem. If you could provide me with a step by step narrative it would be appreciated.
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