The bar graph below shows the percentage of students who received each letter grade on their last English paper. The class contains 20 students. 838205 15 10 A What number of B C Grades D dents earned a B on their paper? students

What is the missing value for x on the diagram below?

How many values are in the range? 25 to 50

3%324 es and its sides. 38 38 12 cm 12 cm

How many values are in the range? 40 to 80

The histogram to the right represents the weights (in pounds) of members of a certain high-school math team. How many team members are included in the histogram? The histogram represents mathteam members. 6- 4- 2- 0- 105 115 125 135 145 155 165

Find the median of the set of numbers 11 25 18 79 12 13

Find and write the proper notation and the proportion as a decimal.

Twenty members of a health club who jog were asked how many miles they jog per week. The responses are to the right. Construct a stem-and-leaf display. For single digit data, use a stem of 0. Complete the stem-and-leaf display. (Use ascending order.) 13 25 16 15 114 2 18 120 31 44 127 23 35 19 20 118 13 17 18 17 D

A tidal wave or tsunami is usually the result of an earthquake in the Pacific Rim, often 1000 or more miles from Hawaii. Tsunamis are rare but dangerous. Many tsunamis are small and do little damage. However, a tsunami nine meters or higher is very dangerous. Civil Defense authorities sound an alarm telling people near the beach to go to higher ground. About 30% of all recorded tsunamis have been nine meters or higher.† You are writing a report about eight recent earthquakes in the Pacific Rim and you want to include a brief statistical profile of some possible events regarding tsunamis in Hawaii. Let r be the number of tsunamis nine meters or higher resulting from eight randomly chosen earthquakes in the Pacific Rim. Make a histogram of the probability distribution of r.