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A large group of students take an examination (top score, 100), and the results are normally distributed. The mean score on the examination is 82, with a standard deviation of 6.58. A study group of four students obtain scores of 78, 82, 88, and 95. For each score, compute the corresponding z-score and find its percentile rank. Round the z-scores to the nearest hundredth place.
A zircon semiconductor is critical to the operation of a superconductor and must be replaced immediately upon failure. Its expected lifetime is 100 hrs.
Most of the time managers will have initial (or prior) knowledge of the probabilities that an event or outcome will result. When new information is obtained, initial probability projections can be revised and improved. What statistical techniques ..
At a factory that produces pistons for cars, Machine 1 produced satisfactory pistons and unsatisfactory pistons today
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Why are larger samples better? Statisticians prefer large samples. Describe briefly the effect of increasing the size of a sample.
Use an appropriate 95 percent confidence interval to estimate the difference between the mean prices of the two brands of cd players. Do you think that the difference haspractical importance?
Using the graph, estimate the predicted price for a home with 3000 square feet.Use the equation to predict the price for a home with 3000 square feet.
What is the probability that the first card dealt is an ace of spade?
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
Data were collected as part of a study or coffee consumption among graduate students. The following reflect cups per day consumed: Use the Data Analysis Tool to compute the sample mean, standard deviation, and median.
Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance.
what is the probability that the sample mean will lie within one unit of p..?
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