Billy earned the following scores on his first 4 GPS Algebra Tests: 70, 85, 86, and 69. If he wants his final test average to be an 80, what does his fifth test grade have to be? 90 Warm up

Practice #1 Old Faithful, a geyser in Yellowstone National park, is renowned for erupting fairly regularly. In more recent times, it has become less predictable. It was observed that the time interval between eruptions was related to the duration of the most recent eruption. The distribution of its interval times for 2011 is shown below. a)Does the distribution seem normal, skewed, or uniform?

60, 64, 70, 88, 90, 90, 98 Find the: Mean = Mode = Practice #2 Median = Range = & #3

Practice #4 The top five salaries at Technology Incorporated are shown in the table below. Find the mean absolute deviation. Round to the nearest hundredth.

Practice #5 Find the r value and the line of best fit for the following chart r = & #6 y = 0.38x x11952 y6351

Practice #7 With the following equation, find when x = 10 and round to the nearest whole number y = 0.25x & #8 18

Practice #9 In a bag of M&M’s, there are 8 brown, 3 yellow, 3 green, 4 orange, 6 red, and 8 blue. What is the probability that you get a blue? What is the probability that you get an orange? & #10

Practice #11 What is the probability that a randomly selected person is a girl and likes cranium? CraniumYahtzee Boys1525 Girls2010

Practice #12 What is the joint frequency that a randomly selected person is a boy and likes Yahtzee? CraniumYahtzee Boys1525 Girls

Practice #13 Given that the person is a girl, what is the probability that she likes Yahtzee? CraniumYahtzee Boys1525 Girls2010