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The statistics professor plans his classes so carefully that lengths of his classes are uniformly distributed between 45.0 and 55.0 minutes. Determine the probability that the given class period run less than 51.5 minutes.
The number of weeds that remain living after a specific chemical has been applied averages 1.3 per square yard and follows a Poisson distribution. Based on this, what is the probability that a 3 square yard section will contain less than 4 weeds?
Heights of Presidents. With a height of 67 in., William McKinley was the shortest president of the past century. The presidents of the past century have a mean height of 71.5 in. and a standard deviation of 2.1 in.
Compute expected value for each of three actions and find out if manager must accept, further analyze, or reject the lot? Determine expected value of perfect information (EVPI)?
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Lewis earned 85 on his biology midterm and 81 on his history midterm. In the biology class the mean score was 79 with standard deviation 5.
Many newspapers, when reporting results of political polls, say that 'with 95% confidence, the results are in error by no more than ±3 percentage points'.
Draw a scatterplot indicating a strong negative relationship between the variables pf income and mental illness. Be sure to label the axes correctly.
There are three versions of a board game released - version 1, version 2, and version 3. The versions are distributed equally and evenly among all potential sellers of board games.
Were the chi-square and regression tests presented and used correctly? Could the authors' analysis be recreated?
21 percent of the employees in a company have managerial positions, and 31 percent of the employees in the company have MBA degrees. Also, 66 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employee..
A company ships computer components in boxes that contain 20 iteams. Assume the probability of a defective component is .4. use the geometric distribution to find the probability that the first defect is found in the third or fourth component test..
Super Cola Bottles soft drinks labeled "net weight 16 ounces." An overall process average of 16.01 ounces has been found by taking several batches of samples, in which each sample contained 5 bottles.
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