12/16/2017 Print Test 1/7 PRINTABLE VERSION Test 2 You scored 13 out of 46 Question 1Your answer is CORRECT.A service center receives an average of 0.9 customer complaints per hour. Management's goal is to receive fewerthan three complaints each hour. Assume the number of complaints follows the Poisson distribution. Determine theprobability that exactly four complaints will be received during the next eight hours. a) 0.844b) 0.998c) 0.084d) 0.011e) 0.156f) None of the above. Question 2Your answer is INCORRECT.Given the cumulative distribution:Determine Q1, the first quartile.
12/16/2017 Print Test 2/7 Question 3Your answer is INCORRECT.The average life a manufacturer's blender is 5 years, with a standard deviation of 1 year. Assuming that the lives ofthese blenders follow approximately a normal distribution, find the probability that the mean life a random sample of16 such blenders falls between 4.4 and 5.1 years. Question 4Your answer is CORRECT.An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with astandard deviation of 80 hours. How large a sample is need if we wish to be 95% confident that we will be within 10hours of the true mean?
12/16/2017 Print Test 3/7
You've reached the end of your free preview.
Want to read all 7 pages?
- Spring '19
- Normal Distribution