Accelerated Algebra 1

Name: ______Date: ______Period: ______

Accelerated Algebra 1 Statistics Review Calculator Permitted

Multiple Choice. Choose the best answers. Write the letter of your choice on the line provided. ______1. On her math tests, Julie has scored 96, 87, 77 and 72. What must she score on the next test to keep the same average?

A. 66 B. 68 C. 83 D. 88

______2. Mrs. Bell’s grades are shown in the stem-and-leaf plot below. Which measures of central tendency are the same?

A. Mean and Mode B. Median and Mode

C. Mean and Median D. Mean, Median and Mode

______3. What type of correlation does the scatter plot represent?

A. weak positive correlation

B. weak negative correlation

C. both positive and negative correlation

D. no correlation

______4. Using the given scatter plot, determine the line of best fit.

______5. Based on the box-and-whisker plot below, 25% of the data falls between which two numbers?

A. 2 and 13

B. 7 and 13

C. 7 and 17

D. 13 and 21 Multiple Choice. Choose the best answers. Write the letter of your choice on the line provided. ______6. Which type of graph would best display the change in rainfall over a four month period?

A. Box-and-whisker plot

B. Stem-and-leaf plot

C. Bar graph

D. Frequency table

______7. The scatter plot below shows the number of new homes built each year in the town of Montvale. The line of best fit has been drawn on the scatter plot. Use the graph to estimate how many homes will be built in the year 2010.

A. 250

B. 225

C. 175

D. 110

______8. Based on the scatter plot shown at right, which point is an outlier?

A. (500, 10)

B. (800, 38)

C. (1038, 20)

D. (1118, 68)

______9. What is the interquartile range of the data shown on the box-and-whisker plot?

D. 17 Make stem-and-leaf plot for the set of data and answer each question. 10. 47, 41, 60, 75, 85, 53, 57, 76, 79, 81, 84, 86 a. Make a stem-and-leaf plot. b. Find the median. ______c. Find the mean. ______d. Find the mode. ______e. Find the range. ______

11. The table at the right shows the birthrates for 15 selected countries. Make a Box-and-Whisker Plot to answer each question. Birth Rates for Selected Countries a. Find the median, upper quartile, lower quartile, (per 1000 population) and interquartile range for each year’s data. Country 1985 1992 Australia 15.7 15.1 Cuba 18.0 14.5 Denmark 10.6 13.1 France 13.9 12.9 Hong Kong 14.0 11.9 Israel 23.5 21.5 Italy 10.1 9.9 b. Are there any outliers? If so, name them. Japan 11.9 9.7 Netherlands 12.3 13.0 ______Panama 26.6 23.3 Poland 18.2 13.4 c. Draw a box-and-whisker plot for each set of data on Portugal 12.8 11.4 the same number line. Singapore 16.6 17.7 Switzerland 11.6 12.6 United States 15.7 15.7

d. Which set of data seems to be more clustered? Why? ______Use the following information to create a scatter plot in your calculator and answer each question. 12. Metabolic rate, the rate at which the body consumes energy, Mass Rate is important in studies of weight gain, dieting, and exercise. The table to the right gives data on the lean body mass and 36.1 995 resting metabolic rate for 12 women who are subjects in a study of dieting. Lean body mass, given in kilograms, is a 54.6 1425 person’s weight leaving out all fat. Metabolic rate is measured in calories burned per 24 hours, the same calories used to 48.5 1396 describe the energy content of foods. The researchers believe that lean body mass is an important influence on metabolic rate. 42 1418

50.6 1502 a. Write an equation for the line of best fit (linear regression line). 42 1256 ______40.3 1189

b. State the correlation. ______33.1 913

42.4 1124 c. Make a prediction for a mass of 35.5. ______34.5 1052

51.1 1347 41.2 1204

13. Tread depth of the XL tire was measured for different distances driven. The distance driven is given in 1000s of miles and the tread depth is given in millimeters. 1000s of mi mm

a. Write an equation for the line of best fit (linear regression line). 17 5.3 ______41 1.2

25 4.0 b. State the correlation. ______4 6.8

c. Make a prediction for a mileage of 50. ______34 2.3

22 4.1

48 0.3

36 1.9

13 5.7

30 3.3

45 1.9