5. The table shows the scores in a writing competition, ranked from highest to lowest. Score 440 400 370 370 315 290 250 245 Rank 1 2 3 4 5 6 7 8 a) Determine the percentile rank of the score 370. b) Which score is in the 25th percentile?

A teacher wants to assign an 'A' grade to everyone that scores in the 80th percentile.  The grades are:  8  10  12  15  25  40  50  55  60  75  85  90 What is the 80th percentile value What is the meaning

A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 8 children from her practice, measures their height and head circumference and obtains the data shown below.  Height          Head Circumference  27                        17.5 25                        17 26.5                     17.2 25.5                      17 27.75                    17.4 26.25                   17.4  26                         17.1 27.25                    17.4   data table n 3    0.997 4    0.950 5    0.878 6    0.811 7     0.754 8     0.707 9     0.666 10   0.632 11    0.602 12   0.576 13   0.553 14   0.532 15   0.514 16   0.497 17   0.482 18   0.468 19   0.456 20   0.444 21    0.433 22    0.423 23    0.413 24    0.404 25    0.396 26    0.388 27    0.381 28    0.374 29    0.367 30    0.361   compute the linear correlation coefficient between the height and head circumference of a child. r = ____ (round to three decimal places as…

Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows. # of movies Frequency Relative Frequency Cumulative Relative Frequency 0 5     1 9     2 6     3 4     4 1     Table 2.67 Construct a histogram of the data. Complete the columns of the chart.

2. Using the frequency/percentage distribution table below to find the median, 12t percentile, 25th percentile (1" quartile), 75th percentile (3rd quartile) and inter-quartile range (1QR) for the variable "mumber of rooms in respondents' home or apartment." Write one sentence interpreting each statistics. Number of rooms Cumulative Frequency Percent Valid Percent Percent Valid 153 room 7 .8 .8 244 1.2 1.2 2.0 3 968 4.7 4.9 6.9 2507 12.1 12.8 19.7 3758 18.1 19.1 38.8 3972 19.1 20.2 59.1 2965 14.3 15.1 74.2 2186 10.5 11.1 85.3 1146 5.5 5.8 91.1 10 868 4.2 4.4 95.5 11 373 1.8 1.9 97.4 12 217 1.0 1.1 98.5 13 77 4 4 98.9 14 35 2 99.1 15 22 .1 .1 99.2 16 15 .1 .1 99.3 17 47 2 99.5 18 40 2 99.8 19 30 .1 99.9 20 9 .0 .0 99.9 21 5 100.0 22 .0 100.0 Total 19642 94.4 100.0 Missing N/A 1160 5.6 Total 20802 100.0

The data represent the time, in minutes, spent reading a political blog in a day. Construct a frequency distribution using 5 dlassos. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency? 4. 38 42 25 46 49 48 21 34 9 35 38 8. 47 3. 29 32 26 Complete the table, starting with the lowest class limit. (Simplify your answers.) Relative Cumulative Class Frequency Midpoint Frequency Frequency Which class has the greatest frequency? The class with the greatest frequency is from to. Which class has the least frequency? The class with the least frequency is from to