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If 10 people are given the vaccine what is the probability that at least 8 of them will develop immunity to the virus? A test was conducted regarding the reading skills of fourths graders. The resulting data is normally distributed with a mean of 75 and a standard deviation of 8.5. The lowest 6.3% of the students are required to retake the exam before the end of the school year. If a random student is chosen what is the probability that he or she scores less than 59? What score indicates that the student has to retake the exam?
A random sample of 225 SAT scores has a mean of 1522. Assume that SAT scores have a population standard deviation of 300. construct a 95% confidence interval estimate of the mean SAT scores.
The records of a casualty insurance company show that, in the past, its clients have had a mean of 1.8 auto accidents per day with a variance of 0.0016.
Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance?
A professor wants to conduct a study to know whether the grades she gives to her students affect their evaluations of her. She teaches four classes of ten students each.
Mention all samples of size 3, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean.
The Cadet is a popular model of sport utility vehicle, known for its relatively high resale value. The bivariate data given below were taken from a sample of sixteen Cadets
An animal trainer obtained the following data, given in seconds. Construct a histogram, frequency polygon, and ogives for the data, and analyze the results.
Independently of the others. If the jury reaches a decision by majority rule, what is the probability that it will reach a wrong decision?
A particular fast food restaurant is located near a University. 40% of the customers are students. Students prefer the spicier items.
Compute the average number of delayed patients, Lq, for this system. The variance of the sum independent random variables is the sum of the variance.
A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of two colors, red and blue, and with a choice of three seats, soft, medium, and hard.
What is the Chi-square test? Where can you apply it? Please site an example of how it was used and the outcome of the test. I think this could help me better than the book, it is difficult to understand.
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