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An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.4 years of age. If the standard deviation is assumed to be 4.8 years, find the probability that a random sample of 35 U.S. women would show a mean age at marriage of less than or equal to 23 years. (Give your answer correct to four decimal places.)
the mean and standard deviation on a calculus mid term are 61 and 13 points while they are 65 and 19 on the final. if a
Based on your answer to part a, is it unusual for a passenger to have mishandled luggage? Is Peter Greenberg's comment and advice warranted? Explain your answers.
determine the point estimate of the population mean and margin of error for the confidence interval. lower bound is 16
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
For a sample with standard deviation of 10, a score of X = 44 corresponds to z-score of 0.50. Based on this info, determine the sample mean?
A researcher demonstrated a correlation of r = 0.60 between teacher attire and student academic performance across 150 grade schools in her state.
Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.
Calculate the correlation coefficient, coefficient of determination. Check whether there is a relation between correlation coefficient and coefficient of determination.
Why are quasi-experimental designs used more often than experimental designs?
problem 1 - of a random sample of 600 trucks at a bridge 114 had bad signal lights. construct a 95 percent confidence
Let X be the cost of the sofa. What is the average cost of a sofa if the advertised sofa is $250 and the more expensive sofa is $ 375?
1. in a well known quiz show the contestant is asked to choose between door number 1 door number 2 and door
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