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For the most recent year available, the mean annual cost to attend a private university in the United States was $20,182. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,400.
Ninety-nine percent of all students at private universities pay less than what amount? (Round z value to 2 decimal places and your final answer to the nearest whole number.
You have two unbiased estimates, e 1 and e 2 , of a quantity with variances V 1 and V 2 respectively, and covariance Cov {e1,e 2 } = C. Form a new unbiased estimate:
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
Out to right, create a 90% confidence interval estimate of sigma (σ), population standard deviation.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
Your specific assignment for this week is to choose a type of quantitative data to gather from your own life. How many minutes does it take yo to get to work everyday.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of real life situation.
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
Using the menu systems, request descriptive statistics (mean, s.d. and variance) for both your original variables
If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05
The estimated miles per gallon ratings of a class of automobiles are normally distributed with a mean of 12.8 and a standard deviation of 3.2. What is the probability that one of these automobiles selected at random would get:
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
My question bout How do I use the TINV function within excel to back out the t-statistic for the test? Why did you use the TDIST function? I know ho to use the TINV function, but what does it mean to back out the t-statistic for the test?
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