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Some auto companies design emissions sensors so that they must be replaced after 1,00,000 miles. One such company found that the service life (x) in months of these sensors is approximately normal with mean 48 months and standard deviation 9 months. The company has decided to give a guarantee for the sensors for 3 years. What % age of the sensors will not satisfy the guarantee.
Provide the Null and Alternative Hypotheses testing statements for the following statement: There are only 24 hours in a day. What statistical tool would you now utilize to improve your business? Explain the Chi-Square Non-Parametric Testing Concept.
The U.S. Bureau of Labor Statistics released hourly wage figures for western countries in 2000 in the manufacturing sector. The hourly wage was $24.01 in Germany, $22.00 in Japan, and $19.86 in the United States.
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
Carry out a t-test to see if the mean healing rate is significantly lower in the experimental limbs, including all 12 newts. What are the test statistics and their P-values?
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Delta Airlines quotes a flight time of 2 hrs, 5 minutes for its flights from Cincinnati to Tampa. We belive that actual flight times are uniformly distriubted between 2 hours and 2 hours 20 minutes.
Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.6 mg/L. For 26 younger men the sample standard dev..
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation greater than 10 beats per minute.
Consider a binomial distribution with 15 identical trials, and a probability of success of 0.5. Find the probability that x = 2 using the binomial tables
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
Define irregular component in time series and explain the differences between other components as well as its effects.
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