One year Josh had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched) of any male pitcher at his school, with an ERA of 2.94. Also, Sally had the lowest ERA of any female pitcher at the school with an ERA of 2.72. For the males, the mean ERA was 4.257 and the standard deviation was 0.664. For the females, the mean ERA was 4.848 and the standard deviation was 0.791. Find their respective z-scores. Which player had the better year relative to their peers, Josh or Sally? (Note: In general, the lower the ERA, the better the pitcher.) Josh had an ERA with a z-score of Sally had an ERA with a z-score of (Round to two decimal places as needed.)

My Physics professor announced that top 18% will get A in the class.               Class mean is 72, and standard deviation is 6. To get the grade A, what score should I get at least?

Español Valley College and Elm College are two local colleges. For each college, the distribution of the ages of faculty members is clearly bell-shaped. The ages of faculty members at Valley College have a population mean of 51 years and a standard deviation of 6.3 years. The ages of faculty members at Elm College have a population mean of 56 years and a standard deviation of 4.2 years. Maria is 67 years old and a faculty member at Valley College. Salma is 40 years old and a faculty member at Elm College. (a) Find the z-scores of Maria's age as a faculty member at Valley College and Salma's age as a faculty member at Elm College. Round your answers to two decimal places. z-score of Maria's age: z-score of Salma's age: (b) Relative to her population, who is the older faculty member? Choose the best answer based on the z-scores of the two ages. O Maria O Salma O It is unclear who is the older faculty member relative to her population Explanation 2022 Mc X Terms of Use | Privacy Center |…

The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?

A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 1471 and the standard deviation was 317. The test scores of four students selected at random are 1900​,1200​,2200​,and 1370. Find the​ z-scores that correspond to each value and determine whether any of the values are unusual.

In class A, Jamir got 85 for his first test. Jamir's class mean was 75 and the standard deviation was 5.In class B, Laurabelle got 80 in her first test. Laurabelle's class mean was 50 and the standard deviation was 10.In a fair comparison of the two students in two different classes, who did better in his or her test.  (Compare Jamir and Laurabelle's standing in their classes.Note Z-score gives that information.) Jamir Laurabelle Both did the same none of the above

If the mean of a set score is 65 and the standard deviation is 15, what is the zscore of a person whose raw score is 50?

If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation be for the population from which the sample was drawn?