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Warm-up 2.4 (Day 2) Sketch the bar graph and complete 1-3.

Warm-up 2.4 (Day 2) Sketch the bar graph and complete 1-3. 2.4 H.W. Answers #53 and 54. #53 a. The median, where 50% of the data lies, is below $0.25. b. Q1 (The 25% mark) is around $0.10. Q3 (The 75% mark) is around $0.70. c. The data is definitely skewed to the right. The

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Warm-up 2.4 (Day 2) Sketch the bar graph and complete 1-3.

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  1. Warm-up 2.4 (Day 2)Sketch the bar graph and complete 1-3.

  2. 2.4 H.W. Answers #53 and 54 #53 a. The median, where 50% of the data lies, is below $0.25. b. Q1 (The 25% mark) is around $0.10. Q3 (The 75% mark) is around $0.70. c. The data is definitely skewed to the right. The majority of the students have less than a quarter and then the percentiles go up very slowly until it finally reaches $2.75. d. Since the data is skewed it can not be a normal distribution.

  3. 2.4 H.W.#54

  4. Student of the day!Block 4

  5. Student of the day!Block 5

  6. Student of the day!Block 6

  7. Recentered or Rescaled Data? • Converting data from lbs. to kgs.. • Converting data from U.S. dollars to Mexican pesos. (Suppose $1 = 9.4 Mexican pesos) 3. Adding a constant c to each value of the data: x1, x2, x3, x4, and x5.

  8. Complete the worksheet comparing weekly payrolls of Mooseburgers and McTofu • Think about why the mean is not always a good description of the center of data? • You will be given 15 minutes to complete the sheet and then we will be going over the answers. • I will check the completion once the 15 minutes are up for a participation grade. • Keep this sheet with your notes that you took today

  9. 2.4 Cummulative Relative Frequency Pg. 78

  10. 2.5 Normal Distribution Where do you see it? Standardized test results, probability, certain data collection from a large population.

  11. More on Bell Curve

  12. The 68 – 95- 99.7 Rule

  13. Practice Reading the Bell Curve 1) What % of the data is below +1 ? 2) What % of the data is located between the -2 and -1 ?

  14. Solving Problems with Normal DistributionFor Normal Distribution Problem, always draw the bell curve and label the values of mean and standard deviations.

  15. Another Normal Distribution Problem

  16. H.W. Assignment • MooseburgerMcTofu worksheet • Chance for a H.W. Pass ( worth 20 pts = 1 day of a h.w. check) Download onto your TI-83, TI-83 Plus or TI-84 the program Ctlghelp. • The first 3 from each block that downloads the program AND can tell me how to transfer the program to another calculator gets a H.W. pass. **** See me tomorrow morning before 7:55, during 2nd Block (get permission…I might be in the vault making copies), or during 7th block. Just be one of the first 3!

  17. Histogram Worksheet Answers

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