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Settlements in Egypt before the time of the pharaohs are dated by measuring the presence of forms of carbon that decay over time. The first datings of settlements in the Nagada region used hair that have been excavated 60 years earlier. Now researchers have used newer methods and more recently excavated material. Do the dates differ? Here is the conclusion about one location: "There are two dates from Site KH6. Statistically, the two dates are not significantly different. They provide a weighted average corrected date of 3715 ± 90 B.C." Explain to someone interested in ancient Egypt but not interested in statistics what "not significantly different" means. A social psychologist reports, "In our sample, ethnocentrism was significantly higher (P < 0.05) among church attenders than among non-attenders." Explain to someone who knows no statistics what this means.
how do you know if a quadratic equation will have one two or no solutions? how do you find a quadratic equation if you
An object is moving along the straight line as follows. It starts at x = 0 and then it moves to the right to x = 2. Then the object moves to the left to x = - 3
a building 270 feet tall casts a 70 foot long shadow. if a person stands at the end of the shadow and looks up to the top of the building, what is the angle of the persons eyes to the top of the building (assume 5 feet above ground)
A 43 in piece of string is cut into two pieces. One piece is used to form a circle and the other to form a square. How should the string be cut so that the sum of the areas is a minimum?
A pool measuring 20 meters by 24 meters is surrounded by a path of uniform width. If the area of the pool and path combined is 1596 square meters, what is the width of the path?
A teacher bought a package of 48 markers for her first-grade class. After one school year, 13 markers were still working. What fraction of the package of markers was working? Express the result using a simple, convenient fraction that is close in ..
Tropical pools figures that its monthly revenue on the sale of ‘x' pools is given by R = 1500x - 3x2 where ‘x' is less than 25.
the equation a=25000 - 1500t, where t is the time in minutes and a is the altitude in feet, represents the steady decent of a certain aiplane. Graph the equation using the x- and the y- intercepts. How long will it be before the airplane reaches t..
exams in a math class. If her scores on the first four exams are 70, 68, 84, and 82, then answer the following questions.
consider the following data for a clinical
Suppose that a pair of 20-sided dice are rolled (the sides are numbered 1-20). What is the probability that the sum of the dice is 13?
Solve this equation numerically and numerical methods by explicit or implicit methods or crank niclson method
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