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Given a normal distribution of data, we know from the Empirical Rule that in between 2 standard deviations from the mean (i.e. xbar - 2s..to..xbar + 2s) there lies about 95% of all the data.
Calculate and show the percentage of data from xbar - 2s..to..xbar + 2s using Chebyshev's theorem.
Now, if I told you that a certain data set has about 87% of the data between the data points xbar + 2s, how would you reconcile this percentage against what is known for both the Empirical Rule and what you calculated above with Chebyshev's theorem?
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
Show the sampling distribution of p if a random sample of 150 insured individuals is used to estimate the proportion having received at least one ticket.
Find the value of Z-score- standard normal distribution.Find out a value of the standard normal random variable z, call it z0.
If historical time series data is very limited, what type of forecasting approach would be useful.
Chi-square test for goodness of fit - difference in the use of the four entrances?
How does the bell-shaped curve for the sampling distribution of sample means for samples of size n = 100 compare to the bell-shaped curve for sampling distribution of sample means for samples of size n = 60.
A range of values constructed from sample data so that the parameter occurs within that range at a specified probability is:
Compute the variance and standard deviation
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
Verify value of t for the independent Variable, using formula. (That is, using formula in the Formula Sheet compute the t statistic , given data provided in the print out).
Estimate the probability the store will gross over $850 a) At least 3 out of 5 business days.
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