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1. Use of bed nets. A study found that the use of bed nets was associated with a lower prevalence of malarial infections in the Gambia.13 A report of the study states that the signi?cance is P 0.001.
Explain what this means in a way that could be understood by someone who has not studied statistics.
2. Purity of a catalyst. A new supplier offers a good price on a catalyst used in your production process. You compare the purity of this catalyst with that of the catalyst offered by your current supplier. The P-value for a test of "no difference" is 0.27. Can you be con?dent that the purity of the new product is as being statistically signi?cant. Explain what this means in simple terms and offer an explanation for why the health and safety students had a higher mean score.
in statistics is the cumulative distribution function always
A retail store manager kept track of the number of car magazines sold each week over a 10-week period. Find the mean, median, and mode of newspapers sold over the 10-week period. Which measure(s) of central tendency best represent the data
The rise of gasoline prices along with record profits at Exxon-Mobile produced stories of corporate greed. How could you use a statistical model to explain the rise of prices at the pump?
question consider the following experimentrunconditiony1ab12b63ad24abcd75bcd86d87ac128c10a. write down the design
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
On a test, a sample of 5 students has a mean score of 78. The scores of four students of them are: 87, 81, 76, 53. Find the test score of the fifth student and standard deviation of this sample.
questiona search the internet for the latest figures you can find on the age and sex of the australian population.b
In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive. (a) Construct a 95 percent confidence interval for the population proportion..
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
A company manufacturers batteries in batches of 18 and there is a 3% rate of defects. Find the standard deviation for the number of defects per batch.
A mean score of 600 and a standard deviation of 100. What credit score defines the top five percent of scores. Within what range would 85% of credit score fall.
If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?
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