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Q1) Normal distribution has mean of 80 and standard deviation of 14. Find out the value above which 80 percent of values will occur.
Q2) Monthly sales of mufflers in Richmond, Virginia, area follow normal distribution with a mean of 1,200 and standard deviation of 225. Manufacturer would like to create inventory levels such that there is only a 5% chance of running out of stock. Where the manufacturer must set inventory levels?
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
Probability that the entire batch will be rejected?
Utilizing a binominal experiment, that is each trail can be reduced to two outcomes, construct a binomial distribution.
Use given data to create the unbiased point estimate of 12σ'> 2 of percentage of termites that are minor workers.
At 95% confidence using the p- value approach, test the hypotheses. Let α = 0.1.
Graph the distribution using a histogram. Calculate the mean and standard deviation.
Find probability using normal distribution.Using N (1152, 84), the Normal model for weight of Angus steers, what percent of steers weigh.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
Make a List of type of possible errors. Assume that you were interested in knowing the mean score for a certain quiz in a statistics class.
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
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