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1. In a survey, 85% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the standard deviation of X.
2. In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the mean and variance of X.
3. A school is sending 11 children to a camp. If 20% of the children in the school are first graders, and the 8 children are selected at random, what is the mean and variance of the number of first graders chosen?
4. If 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 200 bolts, there are 6 defective bolts?
6. Draw a graph showing the probability distribution for the sample space for tossing four coins.
In a survey of 700 randomly selected workers, 16 percent got their jobs through newspaper ads. Consider hypothesis test that uses 0.05 significance level [95 percent confidence interval], test the claim that less than 20 percent of workers got thei..
A manufacturer of lighting fixtures has daily production costs of C= 800-10x+0.25x^2, where C is the total cost (in dollars) and x is the number of units produced. How many fixtures should be produced each day to yield a minimum cost? What is the ..
Explain the main differences among integers, rational numbers, real numbers, and irrational numbers. How are these used in everyday life? How would you explain the use of each to someone who did not know about the differences?
On a national standardized test with a normal distribution of scores, a mean of 50, and a standard deviation of 3.2, a student's score is 1.2 standard deviations above the mean.
is there a significant decrease in body weight for patients after participating in a 7 week special weight loss diet?
In the language of government statistics, the "labor force" includes all civilians over 16 years of age who are working or looking for work. We select a member of the U. S. labor force at random, and let A be the event that the person selected is ..
What is the probability of getting an A on the paper? What is the probability of getting an A on the exam?
NCTM math standards to include learning goals & objectives, a lesson plan to include differentiation of instruction to address the diverse needs of students and problem solving strategies plus informal and formal assessments that align with object..
a random sample of 17 wolf litters in ontario canada gave an average of x14.9 wolf pups per litter with estimated
Write an equation to represent volume of an open box constructed by cutting congruent squares from the corners of a 24" by 14" piece of cardboard. What is the domain or this model?
Probability : Distribution and Expected Value, A large sports conference moved to have women compose at least 40% of its athletics within 5 years
Find the area S of the region bounded by the parabola y = 5x^2, the tangent line to this parabola at (4, 80), and the x-axis.
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