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Assume that, nationwide, 20% of grade-school students develop influenza. Consider a grade-school class of 25 students ( I changed 15 to 25).
A. Find the probability that exactly 6 students in this class develop influenza.
B. Find the probability that at least 8 students in this class develop influenza.
C. Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
What is the probability that the cereal would be high calorie? In other words, what is P (high calorie)?
Recent actual and forecasted data for product XYZ is given in the following table.
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
Write down the name of 4 parts of the regression equation.
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
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