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The professor decides to assign a grade of A+ to the students with the top 8% of the grades, and a grade of A to the next best 12%. What is the minimum percentage a student needs to earn a grade of A?
the wind mountain archaeological site is located in soutwestern new mexico. wind mountain was home to a culture of
The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows Poisson distribution with a mean of 9 tickets per day.
a) Given a random variable x with mean 10 and variance 9, find the expected value and variance of the random variable y where y = 12 + 2x.
In recent year, of the 109,857 arrest fro federal offenses, 29.1% were for drug offenses. Use a .01 significance level to test the claim that the drug offense rate is equal to 30%.
What is the probability that a randomly selected high school senior's score on the mathematics part of the ACT will be more than 29?
The mean weight was 150 grams, and the mode weight was 110 grams. What is the only sequence of seven weights to fit this description?
Suppose an x distribution has mean μ = 5. Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. (a) What is the value of the mean of each of the two x distributions?
find the number of possible 4-letter sequences (words) where the same letter can appear in the word more than once.
Marketing and Consumer Behavior In a recent survey of home-buyer preferences, consumers were asked about desired characteristics, such as a wood-burning.
two uninsulated rigid tanks contain air. initially tank a holds 1 lbm of air at 1440degr and tank b has 2 lbm of air at
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 51.7 , with a standard deviation of 10.9. Based on this inf..
Prepare the schedule of cash collections from sales and the schedule of cash disbursement for materials, labor, overhead, and selling and administrative.
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