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1. The grade of a Math Quiz is normally distributed with its mean, 81 and standard...
.2. The historical data of a company’s annual sales is normally distributed with its mean, $330 million and its standard deviation, $45 million. Find the probability that the company’s sales will be between $300 million and $ 400 next year?
Assume math scores on the SAT are normally distributed with a mean of 500 and a standard deviation of 100. a. What is the probability that one randomly selected individual taking the sat will have a Math score of more than 530? b. What is the probability that one randomly selected individual taking the SAT will have a Math score between 450 and 600?c. Find the 60th percentile of these scores.
if statistics test scores were normally distributed with a mean of 81 and a standard deviation of 4, a) what is the probability that a randomly selected student scored less than 70? b) what percentage of students had a B on the exam? c) the top 10% of the class had what grades?
1) The Math 100 test grades are normally distributed with a mean of O and a standard deviation of 1. Find the probability of selecting a student having a grade: a. Less than 1.25 b. Between - 1.0 and 1.59 c. Greater than 1.35 d. Find Pro the test score that is the 70 percentile
4. A top brand of a popular pickup truck's life is normally distributed with its mean, 12 years and standard deviation, 4 years. Suppose that the top executives of the automaker decided that only 1.2% of new trucks sold could be replaced with a new truck or fully refunded within the warranty period. What should be a desirable warranty period? 5. The grade distribution of a basic English course in a high school (total 3500 students) is normally distributed with...
Math 132 final exam grade is normally distributed with mean 68 and standard deviation 23. Final exam score above 92 corresponds to an A. Approximately what percent of the class got an A? 85% 15% 16% 84%
Math 100 test scores are normally distributed with a mean of 75 and a standard deviation of 7: a) Find the probability that a grade is between 65 and 80 b) Find the grade that is the 30th percentile
Grade point averages of math majors at a large distance education university are normally distributed with a mean of 2.85 and a standard deviation of 0.30. If a random sample of 25 math majors is selected from that university, what is the probability that the sample mean grade point average will be a. either less than 2.709 or more than 2.955? b. at least 2.757?
Scores on a quiz are normally distributed with a mean of 9.6 and a standard deviation of 3. Compute the z score for a quiz score of 10. Round your final answer to three decimal places.
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.4. Find the probability that a randomly selected medical student who took the test had a total score that was more than 530. The probability that a randomly selected medical student who took the test had a total score that was more than 530 is _______