Warm-up Day of 2.1 to 2.4 Quiz Create an appropriate visual display and write a few sentences comparing the distributions of the data below: Number of Hurricanes 1944 – – , 2, 1, 2, 4, 3, 7, 2, 3, 3, 2,2, 1, 0, 1, 2, 3, 2, 1, 2, 2, 5, 2, 2, 4, 2, 2, 6, 0, 2, 5, 1,2, 3, 1, 1, 1, 3, 0, 1, 3, 2, 3, 1, 0, 31, 2, 1, 1, 0, 5, 6,1, 3, 5, 3

Student of the day! Block 1

Student of the day! Block 2

Answers to 2.1 to 2.4 Review 1) 2) There are two outliers 24 and 25. First I multiplied the IQR by 1.5 to get 7.5. When I added it to Q3 and subtracted it from Q1, there were no numbers in my data set that were above Q , or numbers below Q1 – ) Both the mean and the standard deviation would double. 4) The student should ask for the mean because it takes outliers into account.

More answers to 2.1 to 2.4 Review The mean would decrease. The median and mode would stay the same.

Remaining Answers of 240, there is about 2 outliers. 9. Min: 4.5 minutes; Q1: 40.5;Median:43.5; Q3: 46.5;Max: About 22% 11. About the category. The last 3 bars add up to 10 so 230/240 = 95.8% 12. The data is unimodal with a large gap between 5 and 33 minutes.

Bingo Review of 2.1 to 2.4 Fill in your Bingo Cards! ABCDE Always True Some- times True Never True YesNo Stem- and- Leaf Histo- gram MeanMedian IQRVarianceRangeSkewed Right Skewed Left UniformSymme- tric Approx. Normal BimodalCategor- ical DiscreteConti- nuous Scatter- plot Relative Frequency

Bingo Review 2.1 to 2.4 (Slide 1) 1.Mickey Mantle played with the New York Yankees from 1951 through He had the following number of home runs for those years: 13, 23, 21, 27, 37, 52, 34, 42, 31, 40, 54, 30, 15, 35, 19, 23, 22, 18. Were any of these years outliers? 2.What would be the best data display for this information?

Bingo Review 2.1 to 2.4 (Slide 2) 3) Sometimes, Always or Never True: The total area under a density curve and above the horizontal axis is 1. 4) The following table gives the results of an experiment in which the ages of 525 pennies from current change were recorded. "0" represents the current year, "1" represents pennies one year old, etc. Describe the shape of the data.

Bingo Review 2.1 to 2.4 (Slide 3) 5) The mean of a set of 150 values is 35, its median is 33, its standard deviation is 6, and its IQR is 12. A new set is created by first subtracting 10 from every term and then multiplying by 5. What other summary statistic, other than the standard deviation, is 5 times greater in the new data set? 6)

Bingo Review 2.1 to 2.4 (Slide 4) 7) Sometimes, Always or Never True If you added 25 to every value in the dataset, the standard deviation will change. 8) What would be the shape of a histogram displaying the results of 1000 repetitions of the # of heads when flipping four coins at once ?

Bingo Review 2.1 to 2.4 (Slide 5) 9.

Bingo Review 2.1 to 2.4 (Slide 6) 10) In a normal distribution curve mean, _____, and mode are all represented by the same number. 11) Histograms are best for displaying what kind of numerical data?

Bingo Review 2.1 to 2.4 (Slide 7) 12. A distribution of SAT Math scores for 130 students at a suburban high school provided the following statistics: Min.: 485, Q1: 502, Median: 520, Q3: 544, Max.: 610, Mean: 535, Std. Dev.: 88. Which of the following is true? A.The distribution is skewed to the left and there are no outliers. B. The distribution is skewed left and there is at lease one outlier. C.The distribution is skewed to the right and there are outliers. D.The distribution is skewed to the right and 65 students scored better than 520. E. The distribution is skewed to the right and 65 students scored better than 535.

Quiz directions Read carefully. Write out sentences if it says explain, compare, describe. When drawing the boxplot from the cumulative % or cumulative frequency graph, I understand you are estimating. When you finish turn in your quiz and work on the h.w. 2.4 E#49 and #53