Helga scored in the 70th percentile rank on an exam. If 300 students took the exam, how many students scored lower than Helga?

A recent survey reports that 22% of students take the bus to campus. If 660 students commute to campusby bus, how many students participated in the study?

In a sample of 169 students, 16 said they have donated blood. What percent of the students have donated blood?

If four out of every seventeen students prefer to write with pens over pencils, what proportion of students prefer pens to pencils?

I can't understand why the data is the percentage of surveyed parents.

A mathematics professor lost a test paper belonging to one of her students. She remembered that the mean score for the class of 20 was 81 and that the sum of the 19 other scores was 1530. What was the grade on the paper she lost?

During a basketball practice mai attempted 40 free throws and was successful on 25% of them. How many successful free throws did she make?

A student has an average of 81 on four equally weighted tests she has taken in her statistics class. What grade must she receive on her fifth test if she needs an average score of 83? Answer is 91? Can you help me to explain to me step by step?

Recently a community college offered a 2-credit course to help students with math anxiety. At the beginning of the course, each student took a 30-question survey (called MARS-S); the higher the score, the more anxiety experienced by the student. The nine students remaining in the class took the same survey at the end of the course. The before and after scores for each of the nine students who completed the course are shown below, student before after 1 72 69 66 52 3 83 71 97 85 95 61 78 45 95 56 8. 52 43 93 62 Compute the correlation between before and after scores for these students. (Assu conditions have been satisfied and round your answer to the nearest 0.001.) the correlation Question Help: D Video O Message instructor Submit Question 目 Cip Co %23 24 96 & 4. 5 7 8. 9.

Thomas scored at the 45th percentile on the midterm.  Which interpretation of his score is the best? Group of answer choices 45% of the people tested exceeded his score. Thomas had a better score than 45% of the people tested. Thomas got 45% of the items correct. More than one of the above is appropriate.