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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.
Find the range and the standard deviation of the times.
If the top 15% of the test scores are usually good enough for admission to law school, find the cut off score for gaining admission.
An economics professor randomly selected 100 millionaires in the United States. The average age of these millionaires was 54.8 years with a standard deviation of 7.9 years.
Critically discuss some concepts behind variance analysis? Why is it important to test for variances in your data? Explain. How is variance analysis used in health care administration?
A psychologist is examining the influence of an older sibling in the development of social skills. A sample of 24 three year old children is obtained.
Assuming the tires are selected at random from among all tires being produced, how many tires in the shipment of 3000 are expected to have a lifetime that is less than 35,000 miles?
The following data were obtained from an independent measures study. Determine if there is a significant difference between the treatments. Use a significant level of .01.
Is there enough evidence to support the consumer's conjecture at alpha=.10? 7.2 8.1 7.8 7.4 8.0 8.2 8.1 7.9
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
Median $2.4 million, modal sales $2.6 million and standard deviation of distribution is $500,000. Determine the Pearson's coefficient of skewness?
Overall, 230 people correctly guess which is the low calorie product. Is there evidence of a difference in taste between the two products?
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