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Average age for a person getting married for first time is 26 years. Suppose ages for first marriages have normal distribution with standard deviation of four years.
a) Determine the probability that the person getting married for first time is younger than 23 years of age?b) Determine the probability that the person getting married for first time is in his or her twenties?c) 90% of people getting married for first time get married before what age?
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
For each, draw the histogram of the sampling distribution of bar(y). Which sampling distribution has the smaller variance, and why?
An experiment with three outcomes has been repeated 50 times, and it was learned that E1 occured 20 times, E2 occured 13 times, and E3 occured 17 times.
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
The standard screening test for Down's Syndrome is based on combination of maternal age and the level of serum alpha-fetoprotein. Using this test 80% of Down's syndrome cases can be identified, while 5 % of normals are detected as positive.
What does null hypothesis for repeated-measures hypothesis test state?
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
Briefly discuss probability distributions. What is a normal distribution? Please provide a written example of how 'understanding distribution' can be an asset for any business project.
A group of students collected data at the Cedar Point amusement park and reported that the "wait time" to ride the "Top Thrill Dragster" roller coaster is consistently distributed within a range of 40 minutes to 90 minutes.
Sample of 81 houses was studied and found to have the mean of 1858 KWH. Determine the 95% confidence interval for true mean.
Discuss the fields in which Poisson distribution is applied. Why does it matter whether a population of arrivals is limited or unlimited?
With a 98% level of confidence a company producing street signs wants to make sure the length of their product is meeting quality standards.
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