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At a small Midwestern college, 60% of the students are female, 70% of the female students are liberal arts majors, and 50% of the male students are liberal arts majors. A student is selected at random to represent the school at a conference. The probability that the selected student is a liberal arts major is what?
Note that Σ x = 2233 and Σ x 2 = 138,053. At the 5% level of significance, can the instructor conclude that the new mean is different from 64?
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
Suppose that you draw a random sample of 27 cans. Find the probability that the mean weight of the sample is less than 6.19 ounces.
If "fair" coin is tossed four times and comes up heads all four times, probability of heads on the fifth trial is?
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
If the names of these 100 people in the building are still unknown but a room is allowed to lodge one tenant at most , then are there how many ways of room occupation?
In testing the equality of the two means below, what is the test statistic? (Use the unequal variances formula)
Develop a joint probability table for these data and use the table to answer the remaining questions. What do the marginal probabilities tell you about the age of the US population?
A recent report in BusinessWeek indicated that 20 percent of all employees steal from their company each year. fewer than 5 employees steal?
The winning team's score in 13 high school basketball games was recorded. If the sample mean is 54.3 points and the sample standard deviation is 11.0 points, find the 98% confidence interval of the true mean.
A contractor is considering a sale that promises a profit of $32,000 with a probability of 0.7 or a loss (due to bad weather, strikes, and such) of $9000 with a probability of 0.3. What is the expected profit?
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