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Use an appropriate confidence interval in reaching a conclusion regarding the problem situation and null hypothesis for given Exercise.
Exercise A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hours to complete the job.
Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Determine and interpret the p-value for the test.
Identify a business research topic and Define the research questions for the identified problem or opportunity
In this study, what was the independent and dependent variable? Describe the center of each distribution: What is the mean for each group?
Illustrate your answer with a histogram of the sample's scores and sketches of the population distribution and the distribution of means, showing the t score and cutoff points for significance.
in an experiment to learn if substance m can help restore memory the brains of 20 rats were treated to damage their
Search the internet for examples of how categorical data is used in the workplace. As a hint, type "categorical data" followed by a topic of interest to you into the search engine.
Based on what you have covered in the course through Unit 7, discuss the pros and cons of hypothesis testing from your viewpoint. Why do you think hypothesis testing can lead to skepticism in general? Remember to cite your resources and use your o..
Develop a Venn diagram to illustrate the data, hence use it to find the probability that a worker picked at random: (1) Does not speaker English, (2) Speak neither of the languages, (3) Speak French and Russian but not English.
A sample of 120 homes sold recently in a big city gave the mean price of homes equal to $270,000 and the standard deviation equal to $70,000. (a) What is the point estimate of the mean price of all homes in the big city?
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
Time it took then to change a water pump was 18 minutes. The SD of the sample was 3. Find the 99% of the interval of the true mean.
In the basic economic order quantity (EOQ) model, if monthly demand is a constant 430 units, the order quantity is 144 (12 dozen), and the firm operates during fifty five-day weeks a year, the cycle time will be approximately?
it is well known that the time it takes to be served an order of wings at a downtown bar from the moment of placing the
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