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August 28, 2013 Keystone & Stats August 29, 2013 Keystone & Stats August 30, 2013 Keystone & Stats No 3rd/4th Period September 3, 2013 Keystone & Stats No 3rd/5th September 4, 2013 Keystone & Stats September 5, 2013 Keystone & Stats September 9, 2013 Keystone What is the greatest common factor (GCF) of 2, 4, 14? A. 2 B. 14 C.28 D. 112 What is the least common multiple(LCM) of 10, 18? A. 2 B. 18 C.90 D. 180 September 10, 2013 Keystone September 11, 2013 Keystone Keystone September 12, 2013 Simplify: 3 11 16 π π 6 6 π π Keystone September 13, 2013 Simplify: 2 2 β2π₯ π§ β4π¦ π§ β3π₯π¦π§ Stats September 13, 2013 Joeβs test grades in History class are: 92, 89, 85, 89, and 90. The semester final will count as two tests. Joe needs to get a grade of 90 or higher for the semester. What is the minimum score Joe can get on the final test and average 90? Keystone September 16, 2013 Simplify: β4 2π β4 2π 3 Stats September 16, 2013 Instead of writing the entire question, summarize the important details! Maggie recently took a road trip. She bought 15 gallons of gasoline for $1.68 per gallon and 12 gallons at a price of $1.76 per gallon. She filled her tank once on the way back with 16 gallons at $1.65 per gallon. What was the average fuel cost per gallon on Maggieβs trip? Keystone September 17, 2013 Simplify: 0 2 β3 2π₯ π¦ β 2π¦π₯ 3 Keystone September 19, 2013 Evaluate: Stats September 19, 2013 Bob had three carries of 8 yards each and five carries of 6 yards each in a recent football game. What was his rushing average (average yards per carry)? Keystone September 20, 2013 Evaluate: 15 8× β 5+9 5 Stats September 20, 2013 A truck was able to average only 40 mph for the first four hours of a delivery route. How long must the driver travel at a speed of 55 mph to average 50 mph for the trip? Keystone September 23, 2013 Evaluate: 2 β2 4 β1 4 0 2βπ π β β π π β3 β4 β2 2β π π Stats September 23, 2013 Juan says that if the standard deviation of a list is zero, then all the numbers on the list are the same. Is Juan correct? If so, briefly explain why. If not, give a counterexample. Keystone September 24, 2013 Evaluate: 296 6 126 216π₯ π¦ π§ Stats September 24, 2013 Would it be appropriate to say that a distribution with a standard deviation of 10 centimeters is more dispersed than a distribution with a standard deviation of 5 inches? Support your position. Keystone September 25, 2013 Simplify the following: 4 3 β 27 2β 8 Stats September 25, 2013 A set of data has a standard deviation of 9. Seventeen is added to each of the original scores in the set of data. What is the variance and standard deviation of the new set of data? Keystone September 26, 2013 Simplify the following: 3β 5+3 3β 5 8 + 18 Keystone September 27, 2013 Simplify the following: 2 5 β 4 10 6 12 ÷ 2 3 Keystone September 30, 2013 September 30, 2013 Summarize the question! Stats October 1, 2013 Keystone Evaluate: β4 1 + 5 2 ÷ 6 β (42 + 5) October 1, 2013 Stats Using your calculator, find the mean, median, variance, and standard deviation for the following: 12, 15, 6, 18, 11, 19, 22, 23, 24, 26, 5, 17, 21, 32, 40 Mean: Variance: Median: Standard deviation: October 2, 2013 Stats Using your calculator, find the mean, median, variance, and standard deviation for the following: 13, 2, 5, 6, 7, 8, 1, 3, 5, 6, 15, 17, 13, 14, 15, 13, 15, 2, 1, 3, 5, 3, 5, 6, 10, 6 Mean: Variance: Median: Standard deviation: October 3, 2013 Stats Using your calculator, find the mean, median, variance, and standard deviation for the following: 17, 21, 25, 24, 23, 21, 19, 18, 24, 23, 22, 21, 25, 24, 22, 23, 24, 18, 19, 11, 15, 16, 17, 18, 24, 23, 22, 20, 22 Mean: Variance: Median: Standard deviation: October 4, 2013 Keystone & Stats Round the following numbers to the hundredths. 7.1412 0.896 12.1387 October 7, 2013 Keystone A band just recorded a new album with 9 tracks. The shortest song on the album is 2 minutes and 21 seconds. The longest song on the album is 3 minutes and 43 seconds. What is a reasonable estimate for the total time of the album? A. B. C. D. 54 minutes 27 minutes 8 minutes 3 minutes October 8, 2013 Keystone When Sammy goes to lunch, he can buy a sandwich for $1.16 and a soft drink for $1.89. Which is a reasonable amount that Sammy would spend on 50 sandwiches and 55 soft drinks? A. B. C. D. $310 $260 $160 $110 October 8, 2013 Stats Describe the different between a percentile and a percentage. A percentage score indicates the proportion of a test that someone has completed correctly. A percentile score tells us what percent of other scores are less than the data point we are investigating. October 9, 2013 Keystone Stephanie is trying to estimate the cost of gift baskets that she is going to give her 4 friends. She knows that baskets cost $6.63 each, candles cost $1.63 each, and candy bars cost $0.94 each. She is also going to get everyone a restaurant gift card for $5.00. Each basket will include the following: β’1 basket β’2 candles β’3 candy bars β’1 gift card Estimate how much money she will spend on all the gift baskets. A. $15.00 B. $76.00 C. $60.00 D. $19.00 October 10, 2013 Keystone Label the following polynomials, βPOLYNOMIALβ or βNOT A POLYNOMIALβ. ππ + π ππ π π π π βπ π ππ β βπ ππ +π For the polynomial below, label the number of terms in the polynomial and the degree of the polynomial. βππππ β πππ π + πππ October 10, 2013 Stats Chloe scored 80% on her English test. There are 249 other students who took the same exam. No one received the same score as she did, but 113 students received a lower score. What is her percentile ranking. What percentage of students scored better than Chloe? October 11, 2013 Keystone πππ + πππ β πππ + ππ β π β βπππ β πππ β πππ + π + π πππ + ππ + π + βπππ β ππ β π October 11, 2013 Stats Find the median for the following sets of data. 3, 11, 6, 5, 4, 7, 12, 3, 10 4, 2, 11, 6, 2, 9 October 14, 2013 πβπ πβπ π + π ππ + πππ + ππ β ππ Keystone October 14, 2013 Stats Find Q1 and Q3 for the following sets of data. 3, 11, 6, 5, 4, 7, 12, 3, 10 4, 2, 11, 6, 2, 9 October 15, 2013 Keystone ππ β ππ + π + πππ β πππ + ππ + ππ + π πππ β ππ + π β πππ β ππ β π ππ β π ππ + π October 15, 2013 Stats Suppose you received the highest score on an exam. Your friend scored the second-highest score, yet you both were in the 99th percentile. How can this be? October 16, 2013 Keystone ππ + ππ β πππ + ππ + πππ ππ + π October 16 (or 17), 2013 Stats The average 20- to 29-year-old man is 69.6 inches tall, with a standard deviation of 2.7 inches, while the average 20- to 29-year-old woman is 64.1 inches tall, with a standard deviation of 2.6 inches. Who is relatively taller, a 75-inch man or a 70-inch woman? October 17, 2013 Find the GCF. π π π ππ π π and ππππ ππ Keystone October 18, 2013 Factor out the GCF. π π ππ + ππ β πππ Factor completely. π π β π β π(π β π) Keystone October 21, 2013 Keystone Factor completely. ππππ + πππππ + ππππ + πππππ Factor completely. π ππππ β ππ + πππ β ππ October 21, 2013 Stats Find the mean, median, mode, range, variance and standard deviation for the following set of data USING YOUR CALCULATOR! Yesβ¦. Your calculator! If you do not have it, GO GET IT RIGHT NOW!!! You donβt have to ask today, just go! You will not be going later in the period. 9, 24, 8, 9, 5, 8, 9, 10, 8, 10, 15, 2, 3, 18, 20, 1, 17, 2, 19, 3