Problem 465
Discuss and distinguish between discrete and continuous values.
Problem 466
Twenty students are enrolled in the foreign language department, and their major fields are as follows: Spanish, Spanish, French, Italian, French, Spanish, German, German, Russian, Russian, French, German, German, German, Spanish, Russian, German, Italian, German, Spanish. (a) Make a frequency distribution table. (b) Make a frequency histogram.
Problem 467
The IQ scores for a sample of 24 students who are entering their first year of high school are: $$ \begin{array}{|c|c|c|c|} \hline 115 & 119 & 119 & 134 \\ \hline 121 & 128 & 128 & 152 \\ \hline 97 & 108 & 98 & 130 \\ \hline 108 & 110 & 111 & 122 \\ \hline 106 & 142 & 143 & 140 \\ \hline 141 & 151 & 125 & 126 \\ \hline \end{array} $$ (a) Make a cumulative percentage graph using classes of seven points starting with \(96-102\). (b) What scores are below the 25 th percentile? (c) What scores are above the 75 th? (d) What is the median score?
Problem 468
The following data is a sample of the accounts receivable of a small merchandising firm. $$ \begin{array}{|l|l|l|l|l|l|l|l|l|} \hline 37 & 42 & 44 & 47 & 46 & 50 & 48 & 52 & 90 \\ \hline 54 & 56 & 55 & 53 & 58 & 59 & 60 & 62 & 92 \\ \hline 60 & 61 & 62 & 63 & 67 & 64 & 64 & 68 & \\ \hline 67 & 65 & 66 & 68 & 69 & 66 & 70 & 72 & \\ \hline 73 & 75 & 74 & 72 & 71 & 76 & 81 & 80 & \\ \hline 79 & 80 & 78 & 82 & 83 & 85 & 86 & 88 & \\ \hline \end{array} $$ Using a class interval of 5 , i.e. \(35-39\), (a) Make a frequency distribution table. (b) Construct a histogram. (c) Draw a frequency polygon. (d) Make a cumulative frequency distribution. (e) Construct a cumulative percentage ogive.
Problem 469
Find the median age in a sample of 6 children with ages 3,6 , \(4,7,9,8\)
Problem 470
Find the mode of the sample \(14,19,16,21,18,19,24,15\) and 19 .
Problem 472
A motor car traveled 3 consecutive miles, the first mile at \(\mathrm{x}_{1}=35\) miles per hour \((\mathrm{mph})\), the second at \(\mathrm{x}_{2}=48 \mathrm{mph}\), and the third at \(\mathrm{x}_{3}=40 \mathrm{mph}\). Find the average speed of the car in miles per hour.
Problem 473
Find the median of the samole 34. 29. 26. 37. 31 .
Problem 474
Arrange the values \(7,8,5,10,3\) in ascending order and identify the value of the median.
Problem 475
Nine rats run through a maze. The time each rat took to traverse the maze is recorded and these times are listed below. 1 min., \(2.5\) min., 3 min., \(1.5\) min., 2 min., \(1.25 \mathrm{~min} ., 1 \mathrm{~min} ., .9 \mathrm{~min} ., 30 \mathrm{~min}\). Which of the three measures of central tendency would be the most appropriate in this case?
