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A QC technician measures the quality for two lots of product. In the first lot, 25 units are tested and the average measurement is 75 with a standard deviation of 15. In the second lot, 32 units are tested with an average mea surement of 69 and a standard deviation of 12. Given that higher is better for this quality measurement, test the hypothesis that the quality of the second lot is lower than that of the first lot using a = 0.05. You may assume the two lots come from populations with the same variance.
a hat contains n coins f of which are fair and b of which are biased to land heads with probability 23. a coin is drawn
mcneese and klein 1991 looked at the average particle size. specifications give the standard deviation of 2 microns. a
Explain how a matched pairs experiment should be conducted to compare texting and typing speeds. Be sure to explain the role of randomization, and why it is important in this experiment and how should randomization be used in this experiment
Findout the value of X using normal distribution which gives standard deviation also mean. A math teacher gives two different tests to measure students' aptitude for math.
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
a researcher wishes to conduct a study on the self-esteem levels of adolescents. she believes that male adolescents
the probability that a randomly selected 2-year-old male feral cat will live to be 3 years old is 0.88493 a what is the
A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
life expectancies for men and women were measured by country. it was found that the average male life expectancy was
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows the normal probability distribution with a mean $45,000 and a standard deviation of $3,000.
1. a manufacture of tires wants to advertise a mileage interval that excludes no more than 10 of the mileage on tires
The types kinds of statistical information collected in your professional setting. Provide examples to illustrate the information/data.
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