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Body mass index (BMI) is a measure of the body fat based on height and weight. According to the document Dietary Guidelines for Americans, published by the U.S Department of Agriculture and the U.S Department of Health and Human Services, for adults, a BMI of greater than 25 indicates an above healthy weight(i.e., over-weight or obese). Of 750 randomly selected adults whose highest degree is bachelors, 386 have an above healthy weight; and of 500 randomly selected adults with a graduate degree, 237 have an above healthy weight.
(a). Find a 90% confidence interval for the difference interval for the difference of P1-P2 between the proportion of bachelor's degree holders and graduate degree holders.
(b). Find a 95% confidence interval for the difference interval for the difference of P1-P2 between the proportion of bachelors degree holders and graduate degree holders
(c). With reference to part (a) and part (b) which of them gives the best precision and why your choice between them.
suppose that three parachutists operate independently lands at a random point on a line between markers a and b. what
A statistical analysis of 1,000 long-distance calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed with μ = 240 seconds and σ = 40 seconds.
an experiment consists of drawing one marble from a box that contains a mixture of red white and blue marbles.1.
Sample data recently collected indicate that Dough Boy's crusts average 30 centimeter in diameter, with a standard deviation of 1.1 centimeters.
the seats were subjected to a safety stress test in which scores were assigned on a continuous scale of 0 to 10.
A random sample is selected from a normal population. The population mean is 60 and the standard deviation is 15. after treatment the sample mean is 65. the sample size is 25.
research shows that the life time of everlast automobile tires is normally distributed with a mean value of 70000
What is the point estimate of the population mean? Using the 95 percent level of confidence, determine the confidence interval for μ.
the accompanying diagram depicts a five step worker-paced headphone manufacturing plant. the headphones are meant to be
I need to find the maximum and minimum surface areas for 2 cubes with a total volume of 432 in^3. No other perameters are specified. I've been able to use common sense to find the max is 432 sq/inches
a lottery offers one 1000 prize one 500 prize five 100 prizes and ten 10 prizes one thousand tickets are sold. what
Standard deviation is 250 pounds. if you pull a weight of at least 4200 pounds with this tow chain, what percentage of time would you expect the chain to break.
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