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The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable.Find the probability that one student selected at random is older than 23.
Statistics and Probability, Statistics
Suppose that the height (x), in inches of a 20 year old man is a normal random variable with a mean of 70 inches and standard deviation of 5.102 inches. What is the 97.5th percentile of all 20 year old men's heights?
Suppose that X1, · · · .Xn are normal with mean µ1; Y1, · · · , Yn are normal with mean µ2, and W1, · · · , Wn are normal with mean µ1 + µ2. Assuming that all 3n random variables are independent with a common variance, f ...
How many years (and months) will it take $2 million to grow to $5.60 million with an annual interest rate of 7 percent?
Babies weighing less than 5.5 pounds at birth are considered "low-birth-weight babies." In the United States, 7.6% of newborns are low-birth-weight babies. The following information was accumulated from samples of new bi ...
Assignment - A dashboard-type report for the case study. You may use Excel or Tableau. The data analysis should be improved from Assignment 1 based on the feedback received and further tools and techniques you learnt in ...
Question: Suppose X is a normally distributed random variable with mean µ = 200 and standard deviation σ = 20 a. Sketch the probability density function of X¯. On the same graph, sketch the probability density function o ...
As parts come off a production line they are stored in trays capable of holding 30 parts each. If the average tray contains 6 defective parts and you sample only 1 part from each tray, what is the probability that the pa ...
What is the instrumental model of corporate management? What is the social contract model of corporate management?
The time required by students to complete an organic chemistry examination is normally-distributed with a mean of µ = 200 minutes and a standard deviation of σ = 20 minutes. Since this particular class is a large lecture ...
Can someone explain this to me? Or draw it out so that I can understand. You may see a problem like the following: a mean score of 20 and SD of 3, and asked what percentage of cases will be between 17 and 23, you would r ...
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