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What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? Why is the Central Limit Theorem used?
Consider situations in your work or home that could be addressed through a continuous probability distribution. Describe the situation and the variables and determine whether the variables are normally distributed or not. How could you change these to a normally distributed dataset?
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
Let X denote number of students which were on bus carrying this arbitarily selected student. One of the 4 bus drivers is also arbitarily selected. Calculate expectations and variances of X.
A manufacturer claims that the mean lifetime, mu, of its light bulbs is 44 months. The standard deviation of these lifetimes is 7 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 43 months.
Findout the 98% confidence interval for true mean. Findout a 98% confidence interval for the cigarette tax in all 50 states.
Intersection of two mutually exclusive events: can be any value between 0 to 1, must always be equal to 1.
Developing project network using AOA that determines completion times.
A pinochle deck has 48 cards, two of each of six denominations (9, J, Q, K, 10, A) and the usual four suits. In a hand of 12 cards, what is the probability of getting a "bare" roundhouse, namely a king and queen of each suit and no other kings or ..
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use the p-value method for testing hypotheses.
Test the proportions of yellow fire trucks have a significantly lower accident rate.
Quality Control A quality inspector checked for imperfections in rolls of fabric for one week. The random variable x represents the number of imperfections found.
Find a 95% confidence interval for the population mean concentration of uric acid in this patients blood. What is the margin of error?
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