Colors that end in “urple” Countries Between Mexico and Canada Sounds that kitties make If you were a hot dog and you were hungry, would you eat yourself? Potent Potables

Graphs & Populations 100 (Question) Identify the population, sample and variable in the following sentence. One spoonful of chili is tasted before serving.

Graphs & Populations 100 (Answer) Population: pot of chili Sample: one spoonful Variable: taste of chili

Graphs & Populations 200 (Question) Look at the holiday histogram. In which month do the most national holidays occur?

Graphs & Populations 200 (Answer) September

Graphs & Populations 300 (Question) 75 bears are tagged and released. Two weeks later, 50 bears are caught and 15 have tags. Estimate the bear population.

Graphs & Populations 300 (Answer) 15/50 = 75/x 250 bears

Graphs & Populations 400 (Question) Look at the circle graph. If Mr. Martin makes $3000 per month, how much does he pay for rent?

Graphs & Populations 400 (Answer).38 * 3000 Rent is $1140

Graphs & Populations 500 (Question) In the student senate elections, 1700 students voted. If this is 80% of the student body, how many students are in the school?

Graphs & Populations 500 (Answer) 1700/80 = x/ students

Measures of Center & Spread 100 (Question) Look at the stem-and-leaf plot about newspapers. Determine the mode.

Measures of Center & Spread 100 (Answer) Mode is 23

Measures of Center & Spread 200 (Question) Look at the stem-and-leaf plot about newspapers. Determine the median.

Measures of Center & Spread 200 (Answer) Median value is the average of the 25 th and 26 th values. The median is 24.5

Measures of Center & Spread 300 (Question) Look at the stem-and-leaf plot about newspapers. Determine the range.

Measures of Center & Spread 300 (Answer) = 117 Range is 117.

Measures of Center & Spread 400 (Question) Determine the mean of the following set of numbers. 12, 15, 8, 1, 35

Measures of Center & Spread 400 (Answer) ( )/5 Mean is 14.2

Measures of Center & Spread 500 Question Look at the stem-and-leaf plot about newspapers. If the IQR=34, Q1=12 and Q3=46, determine which values are outliers using the 1.5 X IQR method.

Measures of Center & Spread 500 Answer 1.5 X IQR = 51 Q X IQR = 97 Q1 – 1.5 X IQR = and 120 are outliers.

Box Plots 100 Question Look at the box plots. Estimate the IQR for the afternoon newspapers.

Box Plots 100 Answer Q3 – Q1 = IQR IQR is about 30 newspapers.

Box Plots 200 Question Look at the box plots. Determine the five number summary for the morning newspapers.

Box Plots 200 Answer Minimum: 0 Q1: 5 Median: 8 Q3: 12 Maximum: 52

Box Plots 300 Question Look at the box plots. What percent of states have more than 37 afternoon newspapers?

Box Plots 300 Answer Because 37 is the upper quartile, 25% of states have more than 37 newspapers.

Box Plots 400 Question Look at the box plots. The middle 50% of morning newspapers are between what two numbers?

Box Plots 400 Answer The middle 50% of the data is between the lower and upper quartiles. This interval is between about 5 and 12.

Box Plots 500 Question Look at the box plots. Which paper would have a larger standard deviation? Explain.

Box Plots 500 Answer Afternoon papers because they have the larger range and IQR, so the squared deviations would be large for the outlier values.

∑ & slope 100 Question Look at the data set w 1 to w 9. Calculate the following: 6 ∑w i i = 1

∑ & slope 100 Answer Add the first 6 terms in set w. 8

∑ & slope 200 Question Look at the world population data. What was the average rate of change between 1950 and 1989? (write your answer in millions)

∑ & slope 200 Answer ( )/( ) The average rate of change between 1950 and 1989 is million people per year.

∑ & slope 300 Question Look at the data set w 1 to w 9. Calculate the following: 7 ∑w i 2 i = 4

∑ & slope 300 Answer Square the fourth through seventh terms and then add them up. 130

∑ & slope 400 Question Look at the data set w 1 to w 9. Calculate the following: 7 (∑w i ) 2 i = 4

∑ & slope 400 Answer Add the fourth through seventh terms and then square the number. 64

∑ & slope 500 Question Write the summation notation for the mean of the following data set: {q 1, q 2, …, q 10 }

∑ & slope 500 Answer 10 ∑q i i = 1 10

Percentiles & Histograms 100 Question Look at the batting average histogram. Which bar represents the mode?

Percentiles & Histograms 100 Answer Mode is.275 to.299 bar because it is the tallest.

Percentiles & Histograms 200 Question Look at the batting average histogram. Which bar represents the median?

Percentiles & Histograms 200 Answer Median is contained in the.275 to.299 bar.

Percentiles & Histograms 300 Question Look at the stem-and-leaf plot about grades. What percentile corresponds to the grade of 100?

Percentiles & Histograms 300 Answer 25/25 * th percentile

Percentiles & Histograms 400 Question Look at the stem-and-leaf plot about grades. What percentile corresponds to the score 86?

Percentiles & Histograms 400 Answer 12/25 * th percentile represents a grade of 86.

Percentiles & Histograms 500 Question Look at the stem-and-leaf plot about grades. What score represents the 24 th percentile?

Percentiles & Histograms 500 Answer x/25 =.24 x = 6 th lowest number A grade of 73 represents the 24 th percentile.