Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results were: Aptitude Score 0 1 Frequency 23 5 5 1 The average (mean) aptitude score: The median aptitude score: 45 2 2 Erner an integer or decimal number more..

What are the relative frequencies

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

The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744

Find the mean for the list of numbers. Ages of patients (in years ) in a clinic: 15, 4, 22, 15 Round answer to the nearest whole number if necessary.

Use the bar chart to answer the following questions: What percent of students have blue eyes?  13.15 % How many total students were surveyed? 38  Students Green and hazel eyes make up what percent of the surveyed students?  % If these ratios were true for all the students at PSU, how many students would have brown eyes?  (27670 students in the student body.) Students

Now consider a bag of ten colorful marbles. You reach into the bag 100 times. Each time you pull out a marble, write down what color it was, then put it back in the bag and do it again. You record the following data: Table describing marble frequency Color Frequency Red 22 Yellow 9 Green 41 Blue 28

(b) How many rats learned the maze in four trials or less?

Save Suppose a random sample of n = 390 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 276 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p= (Round to three decimal places as needed.)

Data was collected for 310 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number of Guests 200-209 210-219 220-229 230-239 240-249 Frequency Class width= 95 58 19 95 43 What is the class width for this GFDT?