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In a study of the relationship between birth order and college success, an investigator found that 126 in a sample of 180 college graduates were firstborn or only children; in a sample of 100 nongraduates of comparable age and socioeconomic background, the number of firstborn or only children was 54. Estimate the difference in the proportions of firstborn or only children for the two populations from which these samples were drawn. Give a bound for the error of estimation.
there are two machines m1 and m2 available for cutting corks intended for use in wine bottles. machine m1 produces
What is the null hypothesis? What is your decision if a = 0.01?
What must be checked in order to compare two population means when you do not know the values of the population standard deviation? Which one?
Peter and Ray built a bike ramp from 20 sheets of 4ft. X 8ft. plywood and propped it up on one end with some bricks. The finished ramp is rectangular. Show 3 ways they might have arranged the wood and give the measurment for each side.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Describe your re..
a government testing agency studies aspirin capsules to see if customers are getting cheated with capsules that contain
Focusing on the cost of a specific later unit in a large production run is often used as a means to more accurately compare steady-state production costs between different models of a product without the comparison being unduly influenced by the d..
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
the assignment 4 real estate data set has information on prices that houses sold for in five different towns. we want
Let m denote a natural number. Use any properties of the natural numbers to argue that m x m is not equal to m + m.
If the probabilities of s1, s2, and s3 are 0.2, 0.4, and 0.4, respectively, then what decision should be made using the expected
Rodney partida is an American who is of Mexican ancestry. He was convicted of burglary with intent to commit rape. Use the "rule of thumb" to find the minimum usual number and the maximum usual number of Mexican-americans.
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