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A sample of 25 diff. payroll dept found that the employees worked an average of 310.3 days with a std dev. of 23.8 days. what is the 90% confidence interval for the average days worked.
A random sample of 15 Golden Retrievers has an average weight of 66 lb. The percentile rank of this sample is: A.85. B.10. C.90. D.80. E.93.
If there is enough evidence to reject the claim of no difference in the ages of the two groups. Use the standard deviations from the samples and the P-value method.
In the history class the mean score was 76 with standard deviation 3.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Probability depends on normal distribution. If a random sample of nine 18 year old men is selected illustrate what is the probability that the mean height
Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
If they enroll this many pupils, how much would they need to charge per pupils in order to realize their profit goal of $5,000.
There are two car dealerships in a particular region. The mean monthly sales at the two dealerships are about the same. Though, one of the dealerships (dealership A) is boasting to corporate headquarters that his dealership's monthly sales are mor..
We want to estimate the population mean within 5, with a 99 percent level of confidence. The population standard deviation is estimated to be 15. How large a sample is required?
Find out the earliest completion time for play and critical path.
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
Estimating a linear regression equation to predict the future values of the dependent variable Y.
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