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For a normal distribution, what z-score value separates the highest 10% of the distribution from the lowest 90%?
Statistics and Probability, Statistics
Assume that n = 8, and p = 2/9 1) Find the probability of at least 2 successes and at least 2 failures. 1-56*(2/9)^3*(6/9)^5-70*(2/9)^4*(6/9)^4-56*(2/9)^5*(6/9)^3 wasn't the answer.
Suppose you want to estimate the proportion of traditional college on your campus who own their own car. Based on some research on other campuses, you believe the proportion will be near 25%. What sample size is needed i ...
Research Scenario: A community psychologist is interested in whether people's self-reported degree of religious belief predicts their self-reported feelings of well-being. She administers two questionnaires to 17 individ ...
In a certain? state, pickup trucks account for 21?% of the? state's registered vehicles. If 100 registered vehicles are selected at? random, what is the expected number of pickup? trucks?
Shekhar plans to invest $1,820 in a mutual fund at the end of each of the next six years. If his opportunity cost rate is 8 percent compounded annually, how much will his investment be worth after the last annuity paymen ...
Five percent of the eyeglasses sold at an optical retailer have tinted lenses. Forty pairs of glasses are sold on a particular day and six have tinted lenses. Identify n, p, and x.
The average starting salary for graduates at a university is $33,000 with a standard deviation of $2,000. If a histogram of the data shows that it takes on a mound shape, the empirical rule says that approximately 68% of ...
Let X be a random variable with range RX = {-1, 0, 1} and let P(X = 1) = P(X = -1) = p/2 for some p ∈ [0, 1]. a) Compute P(X = 0). b) Compute the expectation E[X] and variance Var(X) of X as a function of p, and determin ...
Suppose you are a statistics consultant, hired to study whether a tax on alcohol has decreased average alcohol consumption in Australia. For a given sample of randomly selected individuals, you are able to obtain the dif ...
1. Define organizational communication 2. What interesting about the subject of organizational communication
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