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Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6. This mean lies 0.4 standard deviations below the mean of the sampling distribution. If a second sample of 500 students is selected, what is the probability that for the second sample, the mean number of hours worked will be less than 14.6? Among a random sample of 150 employees of a particular company, the mean commute distance is 29.6 miles. This mean lies 1.2 standard deviations above the mean of the sampling distribution. If a second sample of 150 employees is selected, what is the probability that for the second sample, the mean commute distance will be less than 29.6 miles?
Point out the proportion modeled.
Find the LCM of denominators.
Show that if the roots of the polynomial p are all real, then the roots of p' are all real. If, in addition, the roots of p are all simple, then the roots of p' are all simple.
Let S be the set of ordered pairs of positive integers, let z = (5,8), and define R so that (x1, x2) R (y1, y2) means that x1 + y2 = y1 + x2.
For the given equation, list the intercepts and test for symmetry. Find the slope-intercept equation of the line with the following properties
Problem on combination
Solving the linear equation.
Use the Rational Zeros Theorem and the Boundedness Theorem in order to find all roots (real and complex) of
Solve the system by the elimination method. Solve the system of equation
Determine the empirical probability
Problems on linear equation.
Using rules of absolute value function.
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