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In a certain town, 30% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults (among 4 randomly selected adults) who have a college degree. Find the standard deviation for the probability distribution.
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
To test the difference between two means using two mean z test.
In the following observational studies, describe changes that could be made to the data collection process that would result in an experiment rather than an observation study. Also, offer suggestions about unseen biases or lurking variables that m..
If you had only one minute to estimate the standard deviation of a frequency distribution using only the information that can be obtained from a stem and leaf display, how would you do it and why?
Suppose the manufacturers claim is right, determine the probability the mean of sample is 47,840 miles or less?
Using goodness-of-fit test and.01 level of significance, find out whether accidents are evenly distributed all through the day. Write a short description of your conclusion.
Using the menu systems, request descriptive statistics (mean, s.d. and variance) for both your original variables
This assignment involves displaying an understanding of an independent t-test. Based on my hypothetical research question: What do early childhood educators report about their experiences with fathers' involvement in their programs?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
What kind of probability uses sample spaces to find out numerical probability that event will happen?
Compute standard error of mean? Compute the margin of error, with 95% confidence.
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