The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 140, while the mean score was 77 and the standard deviation was 15. 32 % Use the "Empirical Rule", not a calculator or other technology. Do not round your answers. What is the approximate percentage of students who scored between 62 and 77? % 47 77 62 92 Distribution of Test Scores What is the approximate percentage of students who scored between 47 and 107 on the test? % 107 122 What is the approximate percentage students who scored between 62 and 92 on the test? % What is the approximate percentage of students who scored higher than 107 on the test?

Suppose that the mean score of a class of 34 students was 78. The 17 male students in the class had a mean score of 62. What was the mean score for the 17 female students?

Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?

The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 75 and the standard deviation was 12.  Use the "Empirical Rule", not a calculator or other technology. Do not round your answers. What is the approximate percentage of students who scored less than 51 on the test?%What is the approximate percentage of students who scored between 51 and 99 on the test?%What is the approximate percentage students who scored between 63 and 87 on the test?%What is the approximate percentage of students who scored between 75 and 87 on the test?%

Assume you had the following information regarding three different tests you took: The MATH test mean was 70; the standard deviation was 2; your score is 66. The VERBAL test mean was 60; the standard deviation was 3; your score is 57. The SCIENCE test mean was 80; the standard deviation was 3; your score is 83. On which of the 3 tests did you have your worst performance, relative to other students? A. Math  B. Verbal C. Science

A study group takes a practice statistics exam. They find that the group has a mean score of 80 with a Standard Deviation of 5. Lily has a z-score of 1.9 and wants to know her raw score. Calculate her score.  the answer is Between 89.4 and 89.6 can you please show me the work, how do I find her score?

on a nationwide math test,the mean was 63 and the standard deviation was 7. if roberto scored 75,what was his z-score?

A person scores 81 on a test of verbal ability and 6.4 on a test of quantitative ability. For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard deviation is 5. Which is this person’s stronger ability: verbal or quantitative? Explain your answer to a person who has never had a course in statistics.

There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores is approximately Normal with mean = 21.5 and standard deviation = 5.4. SAT Scores are reported on a scale from 600 to 2400. The distribution of SAT scores is approximately Normal with mean = 1498 and standard deviation = 316. (b) Joshua scores 17 on the ACT. Anthony scores 1030 on the SAT. Assuming both tests measure the same thing, who has the higher score? Report both z-scores. (c) What is the purpose of finding the z-scores for both the ACT and SAT scores?

Adrianna is trying to figure out the sample size for the data set she wants to collect. She thinks the population standard deviation could be as low as 120 or as high as 136. Explain to Adrianna the impact standard deviation will have on her sample size.