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.

A standardized test has a mean score of 500 points with a standard deviation of 100 points. Five students' scores are shown below.Adam: 575  Beth: 690  Carlos:750  Doug:280  Ella: 440Which of the students have scores within two standard deviations of the mean?Group of answer choicesCarlos, DougAdam, Beth, Carlos, EllaAdam, BethAdam, Beth, Ella

On a nationwide test taken by high school students, the mean score was 49 and the standard deviation was 12. The scores were normally distributed. Complete the following statements.(a) Approximately 95% of the students scored between and .(b) Approximately of the students scored between 13 and 85.

In a Statistics test, the average mark is 82 and the standard deviation is 5. All the students from 88 marks up to 94 marks will receive a B grade. If the marks have a normal distribution and 8 students receive B grade, determine the total number of students who sat for the test.

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

Based on sample quiz score data, an instructor found that the average distance from the mean quiz score was 1.25. This measurement reflects the1 pointrange.deviation score.standard deviation.variance.