Ms. Curie is a 11th grade science teacher.  After grading the first two exams, she computed the mean and standard deviation for each exam.    Mean Exam Score  Standard Deviation of Exam ScoresExam 1 90 8.5Exam 2 81 3.2 Which of the following best describes what the standard deviations tell Ms. Curie about the exams. Group of answer choicesThe scores on Exam 1 were better at measuring learning than the scores on Exam 2.The scores on Exam 1 were lower than the scores on Exam 2.The scores on Exam 1 were more consistent than the scores on Exam 2.The scores on Exam 1 were higher than the scores on Exam 2.The scores on Exam 1 were more spread out than the scores on Exam 2.

Question 4Your instructor tells you that the recent exam had a mean of 80 points and a standard deviation of 2.3. Interpret the standard deviation value in everyday language.1 pointThe maximum score was 82.3.Most students earned an 80 on the exam.The typical score was 2.3 points away from the mean.The range of scores was 4.6.

Sue took a test in both biology and math last week. The biology test had a mean of 70 and a standard deviation of 7, whereas the math test had a mean of 75 and a standard deviation of 10. Sue scored a 76 on the biology test and a 76 on the math test. On which test did she do better in comparison to the rest of the class?Choose onethe math testthe biology testShe did the same on each test.cannot be determined

(b) The percentage results in a Maths exam for a class had a mean mark of 70 with a standard deviation of 15. The percentage results in an English exam for the same class had a mean mark of 72 with a standard deviation of 10. The results in both exams were normally distributed. (i) Mary got 65 in Maths and 68 in English. In which exam did Mary do better relative to the other students in the class? Justify your answer. ݖଵ Answer: Justification: 0

Here are the quiz scores from Brother Garcia's class. Please calculate the standard deviation of the data. Round to 2 decimal places.Student Quiz Score1 802 803 904 705 806 807 708 909 6010 2011 1012 7013 6014 8015 80Group of answer choices68 is the Standard Deviation in the Quiz Scores23.36 is the Standard Deviation in the Quiz Scores24 is the Standard Deviation in the Quiz Scores1020 is the Standard Deviation in the Quiz Scores

Suppose the scores on an exam are normally distributed with a mean μ = 75 points, and standard deviation σ = 8 points.The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores? 0.1587 0.75 0.2266 0.7734 −0.75