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You've administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other.
Group A Scores Group B Scores
77 100
87 99
80 62
91 57
77 95
84 96
90 69
60 32
79 83
66 98
You must decide which group to choose. Consider at least two measures of central tendency and at least one measure of dispersion for each group and use those to make your choice. Be sure to justify your choice with at least one page of discussion and analysis. Can you base a decision on the information provided and the measures that you calculated only?
The standard deviation of the sample is $3,000. Interpret your findings.
Determine a 95% confidence interval for mean amount spent by all Internet shoppers.
These individuals are then examined and categorized as to whether they have a heart disorder. The observed frequencies are as follows:
About 40% of the general population donate time and energy to community projects. Suppose 15 people have been randomly selected from a community and each asked whether he or she donates time and energy to community projects.
Small bag of Skittles candies has following assortment: red (12), blue (5), orange (15), brown (0), green (16), and yellow (7). Create the probability distribution for x.
let the number of trials be n = 3, and let the probability of success be p = 0.0228. Use a calculator to compare:
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
Suppose the weight of a product is normally distributed with a mean of 1.5 and a variance of 0.2. What percentage of products will have weights within +/- 3 standard deviations? Critically discuss the lower and upper limits bounding 50% of product we..
What is the probability that no more than two of the three are commercial successes?
Critically illustrate out the characteristics of a standard normal distribution? Can two distributions with the same mean and different standard distributions be considered normal?
When we move from the basic normal distribution to the sampling distribution of the mean we substitute the standard error of the mean for the standard deviation when we make the conversion to the standardized normal distribution.
The Central Limit Theorem states that the sampling distribution of means is:
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