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A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the weight ofthe boxes, a few were checked. The mean weight was 20.4 pounds, the standard deviation 0.5 pounds. How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.
Explain your findings (including the logic of comparing within-group to between-group population variance estimates, how each of these is figured, and the F distribution).
Determine the 95% confidence interval for the population mean, based on the sample mean.
Explain how much should the airport authority be willing to pay for perfect information about the success of a brand new airport.
You might find the probabilities using the Table or software of your choice. Please explain how you obtained your results.
Results are comparable to what could be expected in human serum. Are true binding percentages for five antibiotics tested all equal? Let α = 0.05.
Bicycle helmet use. Table lists data from a cross-sectional survey of bicycle safety. The explanatory variable is a measure of neighbourhood socioeconomic status (variable_RFM). The response variable is "percent of bicycle riders wearing a helmet"..
Test the hypothesis that no difference exists between the groups at α = .05 and perform and report all related tests and statistics.
Critically illustrate out the term standard deviation. Define mathematical averages. Why is the standard deviation less than the mathematical average?
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
If these answers were combined into single statistic, how could we explain sample space? Mention how many elements are in sample space?
A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar.
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