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A manufacturing company produces electric insulators. If the insulators break when in use, a short circuit will likely occur. To test the strength of the insulators, destructive testing in high powered labs is carried out to determine how much force is required to break the insulators. Force is measured by observing how much pounds must be applied before it breaks. The strength of 30 insulators are in the file.Please help with the below questions:
a. Construct a frequency distribution and a percentage distribution.b. Construct a histogram and a percentage polygonc. Plot a cumulative percentage polygond. What can you conclude about the strength of the insulators if the company requires a force measurement of at least 1500 pounds before breaking.
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses for the employees of the company are normally distributed.
A state meat inspector in lowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled " 3 pounds." Of course, he realizes that the weights cannot be precisely 3 pounds.
Describe the standard normal distribution. Explain why it can be used to find probabilities for all normal distributions.
As a part of their testing program Sony tests samples of 25 batteries. What can you say about the shape of the distribution of sample mean?
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Transmission is normally distributed with an average of 78,000 miles and a standard deviation of 15,000 miles. What percentage of these transmissions will last at least 90,000 miles?
Quantify the uncertainty of your estimate by giving the standard deviation of the distribution. Round your response to at least three decimal places.
A study of postoperative pain relief is conducted to determine if drug A has a significantly longer duration of pain relief than drug B.
Find probability using normal distribution.Using N (1152, 84), the Normal model for weight of Angus steers, what percent of steers weigh.
What do we use the F Distribution to test? Provide an example from your place of employment or circle of influence of an instance when you could use the F Distribution.
The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000. Compute the z values for both 1)Rob and 2)Rachel.
Describe the unique fundamentals of a qualtitative research study, addressing the following:
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