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The combined sat scores of students are normally distributed with a mean of 950 and a standard deviation of 200. nancy bright's sat score was 1390. what percentage of students have scores more than nancy bright?
A sample of 1545 men and an independent sample of 1691 women were used to compare the amount of housework done by men and women in dual-earner marriages.
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
For a given confidence interval, what is the interpretation of a 96% confidence level?
Suppose you went to the Bureau of Labor Statistics web site and found several predictors of your salary. State three possible predictors and a simulated multilinear regression equation along with their p-values.
The salaries of the employees of a corporation are normally distributed with a mean of $25,000 and a standard deviation of $5,000.
Standard deviation of 12%. Assume that scores in both classes follow a normal distribution. Convert Maria's midterm score of 84 to a standard z score.
If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chick..
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
A study of injuries to in line skaters used data from the National Electronic Injury Surveillance System, which collects data from a random sample of hospital emergency rooms.
Given the following raw scores, calculate the following values: Range, Variance and Standard Deviation, show your calculations: Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3
The adult books 20 are nonfiction and of the children's books 103 are nonfiction.if a book is selected at random, find the probability that it will be fiction.
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
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