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Test the equality of the means of three populations.
Test the equality of the means of three populations using the data
T1 = 100
n1 = 10
Total sum squares = 560
T2 = 200
n2 = 15
T3 = 150
n3 = 12
What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
At the .05 significance level, can we conclude that the guideline is still reasonable?
Utilizing the chart parameters developed above to define the control charts for future candy bar production, Compute the appropriate plotting points from the data.
The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.
Some of the factors affect statistical power for a one sample t test. How does statistical power change (increase or decrease) for each of the following changes?
Determine a 95% confidence interval for the true mean weight of such boxes?
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
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