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In a manufacturing process a random sample of 25 bolts has a mean bolt length of 10 inches with a variance of .25 inches. Respond to each of the following questions being sure to show all of your work in the space(s) provided.
a. Should the researcher use t or z to compute this interval? Why so?
b. Compute the 95% confidence interval for the true mean length of the bolts in the overall population.
c. Compute the 99% confidence interval for the true mean length of the bolts in the overall population.
d. Weeks after you have completed the analysis required above, a person on the factory floor makes a comment suggesting that the average bolt length is above 10.3 inches. You think he is mistaken. How sure are you that he has made an error? Explain to him, in everyday English, why your opinion is so strong.
a. Approximately what proportion of overweight children has left atrial diameters less than 25 mm? b. Approximately what proportion of overweight children has left atrial diameters greater than 32 mm?
In January of 2007, the responses reflected an increased belief that global warming is real and due to human activity.- List the errors in this display.
Imagine that you have data on urinary tract cancers in subjects who have used this herb and similar subjects who have not used it and that you can measure.
All in all the web has accelerated and connected much of life that wouldn't be going so fast or would be connected and it is all up to the industries and governments; legal, financial, to keep up.
What is the probability that Brendan randomly selects a chocolate chip cookie from the bag, eats it, then randomly selects another chocolate chip cookie?
an internet retailer stocks a popular electronic toy at a central warehouse that supplies the eastern united states.
Some IQ tests are standardized to normal model with mean of 100 and the standard deviation of 16. Draw a model for these IQ scores, clearly label it , showing what the 65-95-99.7 rule predicts about the score.
in your own words describe what a multinomial experiment is. provide an example of an experiment that is multinomial
Rock from quarry #9 is not suitable for rock needed in quarry #5. Minimize travel needed accomplish all the rock removals and replacements
This problem related to Basic Statistics and it discuss about computing the mean number of job in line and the mode of the number of jobs in line. The calculations have been given in the solution
What if the number of debilitating network viruses detected in a day at the firewalls of an Internet service provider within a certain geographic region is fueling a possible management decision to upgrade the detection system.
Helen is wondering how to plan for the weekend. She will get a letter from home (with money) with probability 0.05.
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