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The weights of certain machine components are normally distributed with a mean of 9.75g and a standard deviation of 0.08g. Find the weights that separate the top 5% and the bottom 5%.
A box contains 9 tickets numbered 1 to 9 inclusive. If 3 tickets are drawn from a box one at a time, find the probability that they are alternative after (1) odd, even, odd or (2) even, odd, even.
How does hypothesis testing contribute to the scientific knowledge base? What is one example of a null hypothesis statement?
At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, "You can average $72 a day in tips." Assume the population of daily tips is normally distributed with a standard deviation of $2.45.
Mighty Manufacturing must decide on the processes to use to produce 1650 units. If machine 1 is used, its production will be between 300 and 1500 units. Machine 2 or machine 3 can be used only if machine 1's production is at least 1000 units. Ma..
A neuropsychologist compare the auditory abilities of blind versus normally sighted rats. He predicted that the visually impaired rats would have better auditory development than normally sighted rats.
Use this as the population mean and the population standard deviation is $.20. What is the probability that the mean price for a sample of 30 service station will be within $.03.
Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700?
Create a 90% confidence interval for proportion of all kernels that would not pop.
Run a regression of Y on X in Excel and turn in the output with a note explaining what the coefficients {correlation coefficient (multiple R), standard error, t-statistic and F-statistic} mean.
Find a 90% confidence interval for the population mean weight of all such turtles.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Determine the probability that computer will fail within 12 months?
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