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For each equation below identify what type of equation it is (linear or exponential), which variable is the independent variable (name it) and which variable (name it) is dependent in the following problem, then identify the parameters (linear: slope and y-intercept; or exponential: initial value and growth rate) and explain the meaning of each of these parameters in the context of each problem:
a) A recent study found that years of schooling (hint: 12 = graduated high school) predicted average weekly earnings (in dollars) via the equation y = -645.25+108.25x.
b) The average yearly cost of college tuition (dollars) has increased by a constant factor each year since the year 1990 via the equation: f(t) = 8421(1.02)t.
The following frequency distribution shows the time (in minutes) that a sample of students uses the computer terminals per day. Compute the coefficient of variation.
Managers at Beta Technologies, Inc., have collected current annual salary figures and potentially related data for a random sample of 52 of the company's full-time employees.
Test the hypothesis that the average price is higher than $1.87. Use level of significance α = 0.05.
Suppose that the actual mean value in the population is mu =120 , what is the probability of a Type II error (incorrectly accepting a false null hypothesis)?
A civil service exam is given to 200 job applicants. In recent years, grades have followed a normal distribution with mean 66.5 and variance 100. The grades of the job applicants are distributed as follows:
What is the probabillity that in a random sample of 1,200 undergraduate business students, 336 or more will major in accounting?
a may 2007 gallup poll found that only 11 of a random sample of 1003 adults approved of attempts to clone a human.find
Does the data set represent a sample or a population? If it is a sample, describe the population from which it has been drawn.
A county has four major hospitals: 1) Regional Memorial; 2) General; 3) Charity; and 4) City. A multiple regression model is used to compare the time spent in the hospital after a heart by-pass surgery among the four hospitals.
A recent report in Business Week indicated that 20 percent of all employees steal from their company each year. If a company employs 50 people, what is the probability that: Fewer than 5 employees steal?
in manoa valley the annual rainfall averages 43.6 inches with a standard deviation of 7.5 inches. a year is chosen at
Assume the chief does not want his officers to cite a car for speeding unless they are 99% sure that it is travelling at 58 miles per hour or faster. What is the minimum estimate of speed at which a car should be cited for speeding?
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