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A teacher gives his class a particular examination on mathematics at the end of each year. The results are normally distributed with a mean test score of 65 and a standard deviation of 7.
The teacher has told the class that students with a test score in the top 25% will win a special prize. Calculate the test score above which 25% of all test scores lie. Give your answer to 1 decimal place.
Find probability using normal distribution.Using N (1152, 84), the Normal model for weight of Angus steers, what percent of steers weigh.
to determine if a new medication to lower blood pressure in adults would have the unpleasant side effect of weight gain
Analyze the causes of the Great War. Explain how the war was fought in Europe. What steps led to the U.S. involvement in World War One?
use the gauss-seidel method without relaxation to solve the following system to a tolerance of error 5. if necessary
The average size increased to 1500 ft2 in 1970, 2080 ft2 in 1990; and 2330 ft2 in 2003 (San Luis Obispo Tribune, October 16, 2005).
Suppose seven people have taken a cruise. Is there any evidence to suggest that the percentage of people who have taken a cruise has increased? Justify your answer.
the daily milk production of cows is normally distributed with a mean of about 35 kgday and a standard deviation of 7
A random sample of 8 observations from another population revealed a sample mean of 26 and a sample standard deviation of 5. At the .05 significance level, is there a difference between the population means?
Suppose that stock prices in the S&P500 can be approximately modeled as normal with mean $33.75 and standard deviation $10.80. If 20 of these stocks
Find the probabilities for the following discrete random variables and find the probability that the salad contains more than 5 vegetables on i) a given day and on ii)3 of the next 4 days?
A small software development project at? Krishna? Dhir's firm has five major activities. The times are estimated and provided in the? table? below:
Undergraduates at her college and mails a questionnaire to 250 students selected at random. Only 104 questionnaires are returned. what is the population.
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