One method of estimating body fat is through skinfold thickness measurement. The measurement can use from three to nine different standard anatomical sites around the body. The right side is usually only measured (for consistency). The tester pinches the skin at the appropriate site to raise a double layer of skin and the underlying adipose tissue, but not the muscle. Calipers are then applied 1 centimeter below and at right angles to the pinch and a reading is taken 2 seconds later. The mean of two measurements should be taken. If the two measurements differ greatly, a third should be done and then the median value taken. Explain why a median is used as the measure of central tendency when three measures are taken, rather than the mean.
Answer to relevant QuestionsThe following data represent the amount of time (in minutes) a random sample of eight students enrolled in Sullivan’s Intermediate Algebra course spent on the homework from Section 4.5, Factoring Polynomials. (a) Determine ...An engineer is studying bearing failures for two different materials in aircraft gas turbine engines. The following data are failure times (in millions of cycles) for samples of the two material types. (a) Determine the ...Find the population mean or sample mean as indicated. Population:3, 6,10,12, 14 For each of the three histograms shown, determine whether the mean is greater than, less than, or approximately equal to the median. Justify your answer. Find the population mean or sample mean as indicated. A random sample of 25 college students was asked, “How many hours per week typically do you work outside the home?” Their responses were as follows: Determine the shape of the distribution of hours worked by drawing a ...
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