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Computing the probability values using normal distribution.
Information from the Department of Motor Vehicles indicates that the average age of licensed driver is µ = 39.7 years with a standard deviation of σ = 12.5 years. Assuming that the distribution of drivers' age is approximately normal, what proportion of licensed drivers are less than 30 years old?
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
By using the normal distribution to approximate the desired probability.
At 0.05 level of significance, is there evidence that proportion of claims processed under this new system is higher than article reported for previous system?
If the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis.
Describe the sampling distribution of the sample mean.
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
Determine following probabilities where Z follows standard Normal distribution?
How much evidence is there that the mean composite satisfaction rating exceeds 42?
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
Describe the independent variable and the dependent variables?
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