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A statistics professor planed her classes so carefully that the lengths of her classes are uniformly distributed between 45 and 55 minutes. Find the probability that a given class period runs greater than 50.25 minutes.
The value of R-square indicates the amounts of variation in the dependent variable that is explained by the independent variable.
A random sample of 36 drinks from a soft drink machine has an average content 7.6 ounces with an standard deviation of 0.48 ounces. Test the hypothesis ounces against the alternative hypothesis at the 0.05 level of significance.
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
The number of cases of merlot wine sold by a Paso Robles winery in an 8-year period follows:
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
If the population standard deviation is s = 10, is the sample sufficient to demonstrate a significant effect? Again, assume a two-tailed test with a = 0.05.
A random sample of five accidents resulted in the following number of persons injured: 18, 15, 12, 19, & 21. Using the .01 significance level, can we conclude the population mean is less than 20 for all accidents?
Explain the difference between descriptive statistics and inferential statistics with less than 50 words? Name two graphs that can be used for describing qualitative data and two for describing quantitative data. Name one graph that can be used to ..
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Using the finite population correction factor, compute the standard error for each of the three firms given a sample of size 50.
Suppose that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more?
What is approximately the largest sample mean of another sample of n= 16 participants you would expect to obtain from this finite population?
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