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A student earned a score of 940 on a national achievement test. The mean test score was 850 with a standard deviation of 100. What proportion of students had a higher score than the student with the score than the student with the score of 940? (Assume that the test scores are normally distributed.)
Construct a 99% confidence interval for the mean workout length for each of the three types of exercises.
a. What is the probability of a student correctly answering no less than 22 questions based solely upon guessing the answer to each question?
The lifetime of a certain type of automobile tire in thousands of miles of normally distributed with mean 37 and standard deviation 5.
based on an examination given to a large class in which the maximum score is 100 points assume that 20 grades taken at
Polling the faculty A researcher wants to study the attitudes of college faculty members about the work habits of entering freshmen.
a study comparing the resting heart rate of four different types of elite athletes recruited 10 cyclists 10 triathletes
They will test 50 students at the third-grade level. Find the mean and standard deviation of the number who may be deficient in vitamin D.
question in a given large town the number of children x in a family chosen at random has the following
vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight
Problem: A random sample of 225 adults was given an IQ test. It wasfound that 105 of them scored higher than100 . Based on this, compute a 95% confidence interval for the proportion of all adults whose IQ score isgreater than 100. Then complete th..
use a table of cumulative areas under the normal curve to find the z-score that corresponds to the given cumulative
Consider the price of homes in a large metropolitan area. What kind of distribution would you expect in terms of skew ness and kurtosis?
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