REVIEW OF DATA ANALYSIS

THE HISTOGRAM REPRESENTS THE 1. THE HISTOGRAM REPRESENTS THE HEIGHTS (IN CENTIMETERS) OF THE FIFTY-SEVEN STUDENTS IN MR. ARNETT’S MORNING CLASSES. HOW MANY STUDENTS ARE MORE THAN 144 CM TALL? A. 8 B. 10 C. 38 D. 43

A. 6 B. 9 C. 26 D. 28 IN THE GRAPH BELOW, EACH DOT SHOWS THE NUMBER OF INCHES OF RAIN AND THE CORRESPONDING DAILY TEMPERATURE FOR ONE OF 9 CITIES. 2. ACCORDING TO THE GRAPH, WHAT IS THE MEDIAN NUMBER OF INCHES OF RAIN FOR THESE 9 CITIES? A. 6 B. 9 C. 26 D. 28

WHAT IS THE RELATIONSHIP BETWEEN THE MEDIAN HEIGHT OF THE TWO CLASSES? 3. A. CLASS B STUDENTS ARE ABOUT 1 ½ INCHES TALLER THAN CLASS A STUDENTS. B. CLASS A STUDENTS ARE ABOUT 1 INCH TALLER THAN CLASS B STUDENTS. C. CLASS B STUDENTS ARE ABOUT 1 INCH TALLER THAN CLASS A STUDENTS. D. CLASS A STUDENTS ARE ABOUT 1 ½ INCHES TALLER THAN CLASS B STUDENTS.

A. 3.01 B. 3.11 C. 3.15 D. 3.97 THE BAR GRAPH BELOW SHOWS THE NUMBER OF STUDENTS AND THEIR SCORES ON THEIR PROJECTS. 4. WHAT IS THE MEAN OF THE SCORES? A. 3.01 B. 3.11 C. 3.15 D. 3.97

A. MEAN B. MEDIAN C. MODE D. RANGE THE TABLE SHOWS THE SCORES THAT JENNIFER EARNED ON FOUR MATH TESTS. 5. IF SHE SCORES A 60 ON THE FIFTH TEST, WHICH VALUE WOULD BE CHANGED THE MOST? A. MEAN B. MEDIAN C. MODE D. RANGE

$21.50, $20.75, $21.75, $21.75, $20.75. A. IT WOULD STAY THE SAME. 6. A COMPANY’S STOCK PRICES FOR 5 DAYS WERE $21.50, $20.75, $21.75, $21.75, $20.75. WHAT WOULD HAPPEN TO THE AVERAGE IF THE PRICE IS $35.00 ON DAY 6? A. IT WOULD STAY THE SAME. B. IT WOULD INCREASE BY $2.28. C. IT WOULD INCREASE BY $7.00 D. IT WOULD DECREASE BY $2.28.

7. A CHILDREN’S BOOK SERIES CONTAINS 6 BOOKS WITH THE FOLLOWING NUMBER OF PAGES: {309, 341, 435, 734, 870, 652}. WHAT IS THE MEDIAN NUMBER OF PAGES PER BOOK? A. 252.7 B. 540.2 C. 543.5 D. 870

A. -4o PER HOUR B. 0o PER HOUR C. 4o PER HOUR D. 16o PER HOUR 8. FROM 6 P.M. TO 10 P.M., THE TEMPERATURE DROPPED FROM 0°C TO –16°C. WHAT WAS THE AVERAGE TEMPERATURE CHANGE PER HOUR? A. -4o PER HOUR B. 0o PER HOUR C. 4o PER HOUR D. 16o PER HOUR

WHICH ARE APPROPRIATE INTERVALS TO GROUP DATA FOR A HISTOGRAM? 9. A. 55–62, 63–70, 71–78, 79–86 B. 56–62, 63–70, 71–78, 79–86 C. 56–62, 62–70, 70–78, 78–86 D. 55–62, 63–71, 72–78, 80–86

MELANIE’S GRADES ON HOMEWORK DOES MELANIE NEED TO HAVE AN IN SCIENCE CLASS ARE 60, 73, 75, 82, 88.   WHAT GRADE DOES MELANIE NEED TO HAVE AN AVERAGE OF 76.5? 10. A. 63 B. 75.6 C. 76.5 D. 81

WHICH IS TRUE USING THE DATA BELOW? 11, 43, 43, 52, 56, 76, 81, 87, 87 11. A. THE MEAN IS 3.6 GREATER THAN THE MEDIAN. B. THE MEAN IS 3.6 LESS THAN THE MEDIAN. C. THE RANGE IS 20 GREATER THAN THE MEDIAN. D. THE RANGE IS 20 LESS THAN THE MEDIAN.

WHICH MEASUREMENT WOULD BE AFFECTED IF THE OUTLIER WERE REMOVED? 12. WHICH MEASUREMENT WOULD BE AFFECTED MOST IF THE OUTLIER WERE REMOVED? A. RANGE B. MEDIAN C. MODE D. MEAN

A. RANGE B. MEDIAN C. MEAN D. MODE 13. IF THE OUTLIER IS REMOVED FROM THIS DATA BELOW, WHICH MEASURE OF CENTRAL TENDENCY WILL BE AFFECTED THE LEAST? 56, 64, 73, 59, 98, 65, 59 A. RANGE B. MEDIAN C. MEAN D. MODE

A. 10% B. 20% C. 30% D. 40% IN THE TABLE BELOW, WHAT PERCENT OF THE PEOPLE SURVEYED PREFER BOLOGNA? 14. A. 10% B. 20% C. 30% D. 40%

A. 64 B. 65 C. 66 D. 68 WHAT IS THE MEDIAN NUMBER OF HITS? THE STEM-AND-LEAF PLOT DISPLAYS THE NUMBER OF HITS IN A SEASON FOR PLAYERS ON A SOFTBALL TEAM. 15. WHAT IS THE MEDIAN NUMBER OF HITS? A. 64 B. 65 C. 66 D. 68

FOUR STUDENTS LISTED THEIR TEST SCORES IN A STEM-AND-LEAF PLOT. 16. FOUR STUDENTS LISTED THEIR TEST SCORES IN A STEM-AND-LEAF PLOT. WHICH STUDENT HAS THE GREATEST MEAN? A. B. C. D.

17. A SECTION OF A CIRCLE GRAPH SHOWS THAT 45% OF SEVENTH GRADERS PREFER APPLES. WHAT IS THE NUMBER OF DEGREES THAT WOULD REPRESENT THAT SECTION? A. 40.5o B. 81o C. 121.5o D. 162o

THE CIRCLE GRAPH BELOW SHOWS HOW A FAMILY USES ITS MONTHLY INCOME OF $2,500. WHICH STATEMENT IS TRUE? 18. A. The family saves one-fifth of its monthly income. B. The family spends less than $700 on housing each month. C. The family spends $625 on automobile expenses each month. D. The family spends more than one-half of its monthly income on food and automobile expenses combined.

80, 79, 80, 88, 90, AND 100. SARA GRAPHED HER AVERAGE GRADES FOR 19. SARA GRAPHED HER AVERAGE GRADES FOR 4 SEMESTERS. HER GRADES ONE SEMESTER WERE 80, 79, 80, 88, 90, AND 100. USING THE GRAPH BELOW, WHICH SEMESTER ILLUSTRATES THE AVERAGE OF THESE GRADES? A. SEMESTER 1 B. SEMESTER 2 C. SEMESTER 3 D. SEMESTER 4

A. RANGE B. MODE C. MEDIAN D. MEAN THE SCIENCE CLUB CONSTRUCTED AND 20. THE SCIENCE CLUB CONSTRUCTED AND FLEW PAPER AIRPLANES. THE DISTANCES FLOWN WERE RECORDED AS SHOWN IN THE CHART BELOW. THE WINNING TEAM WOULD BE DECIDED BY THE LARGEST VALUE OF A PARTICULAR STATISTICAL MEASURE. WHICH STATISTICAL MEASURE WAS USED IF TEAM 2 WAS DECLARED THE WINNER? A. RANGE B. MODE C. MEDIAN D. MEAN