facing a shortage the student activity council decides to reduce funding for each of it's student club by $85.00. Prior to the cut the average funding that each student club received was $520.00, although some received more while others received less than $520. On average the funding received differed the mean by $55.00. What will be the new standard deviation of the distribution?

A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. What proportion of people scores in the A range (90 or above)?

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 of 21.2 and standard deviation of 5.2, SAT scores are reported on a scale from 400 to 1600. The distribution of SAT scores is approximately Normal, with mean of 1,159 and standard deviation of 205. What ACT scores make up the top 10% of all the scores? Round to the nearest whole number. 80 888 #3 $ & 3 4. 7 E Y U F G H J K DI

Pearson publishes textbooks each semester and the mean number of textbook pages published by Pearson for 2020 is 568 with a standard deviation of 150 pages.  What is the chance you will have to read a textbook published by Pearson in 2020 that has more than 733 pages? Write your answer as a percent.

Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of students scored about 57%. Round two places.

Mario scored 82 on his history final. The class mean was 78 with a standard deviation of 3 points. He scored 72 on his biology final with a mean score of 65 and a standard deviation of 5 points. Which grade was better compared with the class mean referencing a normal distribution?   a. The biology test is better. The z-scores for the biology exam and the history exam respectively are 1.4 and 1.33.   b. The biology test is better. The z-scores for the biology exam and the history exam respectively are 1.33 and 1.4.   c. The history test is better. The z-scores for the biology exam and the history exam respectively are 1.33and 1.4.   d. The history test is better. The z-scores for the biology exam and the history exam respectively are 1.4 and 1.33.

I just need help solving this.

The table below displays the mean and mean absolute deviation (MAD) of the distance (in miles) covered on the treadmill by Laura, Jayden, and Emma during their gym time for 7 consecutive days.   Who has the greatest variability in the distance covered on the treadmill? On average, who covers the farthest distance? Who is the most consistent runner?

After calculating the mean and standard deviation, how do we interpret the result, and when a variable look strange?

Exhibit 6-5The weight of items produced by a machine is normally distributed with a mean of 8 ounces and a standard deviation of 2 ounces.   Refer to Exhibit 6-5. What percentage of items will weigh between 6.4 and 8.9 ounces?