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The average SAT score in the US is 1060, and the standard deviation is 195. Assume...
please show work. 2. Assume that SAT scores are normally distributed with meanu = 1060 and...
please show work.
2. Assume that SAT scores are normally distributed with meanu = 1060 and standard deviation o = 195. a. If one SAT score is selected at random, what is the probability that it is greater than 1500? b. If twenty SAT scores are selected at random, what is the probability that they have a mean greater than 1500?
Scores on the SAT have an approximately normal distribution. THe mean SAT score is 1060 and...
Scores on the SAT have an approximately normal distribution. THe mean SAT score is 1060 and a standard deviation of 195. Would it be unusual for someone to score a 1250 on the SAT? Explain and show using probability.
Scores on a test are normally distributed with a mean of 65 and a standard deviation...
Scores on a test are normally distributed with a mean of 65 and a standard deviation of 10. Find the score to the nearest whole number which separates the bottom 81% from the top 19%. A. 88 B. 68 C. 56 D 74
15) Assume that z scores are normally distributed with a mean of 0 and a standard...
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
The mean mathematics SAT score was 566 and the standard deviation was 126. A sample of...
The mean mathematics SAT score was 566 and the standard deviation was 126. A sample of 70 scores is chosen. Use table A.2. Do you think it would be unusual for an individual to get a score greater than 567? Explain. Assume the variable is normally distributed.
A average score on the SAT is 1497 with a standard deviation of 322. A test...
A average score on the SAT is 1497 with a standard deviation of 322. A test preparation center offers a retake preparation course for students who score in the lowest 5% of SAT scores. What is the maximum SAT score that meets the course requirements?
Suppose SAT Mathematics scores are normally distributed with a mean of 515515 and a standard deviation...
Suppose SAT Mathematics scores are normally distributed with a mean of 515515 and a standard deviation of 115115. A university plans to send letters of recognition to students whose scores are in the top 10%10%. What is the minimum score required for a letter of recognition? Round your answer to the nearest whole number, if necessary. Answer
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is 33, A special preparation course claims that its graduates will score higher, on average, than the mean score 551. A random sample of 43 students completed the course, and their mean SAT score in mathematics was 556 Assume that the population is normally distributed. At the 0.05 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is 25. A special preparation course claims that its graduates will score higher, on average, than the mean score 512. A random sample of 25 students completed the course, and their mean SAT score in mathematics was 520. Assume that the population is normally distributed. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
Assume math scores on the SAT are normally distributed with a mean of 500 and a standard deviation of 100.
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.
please show work.
2. Assume that SAT scores are normally distributed with meanu = 1060 and standard deviation o = 195. a. If one SAT score is selected at random, what is the probability that it is greater than 1500? b. If twenty SAT scores are selected at random, what is the probability that they have a mean greater than 1500?
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is 33, A special preparation course claims that its graduates will score higher, on average, than the mean score 551. A random sample of 43 students completed the course, and their mean SAT score in mathematics was 556 Assume that the population is normally distributed. At the 0.05 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is 25. A special preparation course claims that its graduates will score higher, on average, than the mean score 512. A random sample of 25 students completed the course, and their mean SAT score in mathematics was 520. Assume that the population is normally distributed. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
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