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Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
Consider a four digit uniform random number generator; as in each of the 10,000 values 0.0000 through 9999 is equally likely. Find the mean and variance of the values produced by such a random number generator.
The Aloha Banking Co. is studying ATM use in suburban Honolulu. A sample of 30 ATM's showed they were used the following number of times yesterday.
What is approximately the largest sample mean of another sample of n= 16 participants you would expect to obtain from this finite population?
On average a certain intersection results in 3 traffic accidents per month. What is the probability that for any given month at this intersection
Explain clearly, in your own words, what is a Type I error in this context.
Testing for Population mean - Based on this sample evidence, is Joan's supervisor correct? Use a = .05.
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
What are the null and alternative hypotheses in this situation?
What is the margin of error for a 95% confidence interval for the difference of the two means (low capacity - high capacity)? (Answer to the nearest hundredth.)
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
Which measure of association do you use to compare the relationship between these variables? Why?
A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg.
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