It is very important that you do tonight's homework because this is our only practice with invnorm before our unit 1 test on Thursday!
If you were out today we learned how to use "invnorm" in our calculator--you should do your best to teach yourself this from chapter 6 in our book, OR watch this video! to learn about invnorm--we have a test Thursday so you have to know this stuff!
Here's the homework:
Period A:
- Please complete questions f, g, h, and i on the "Calculating Z Scores and Percentiles" worksheet that we started in class on Thursday.
- Then, please complete questions a,b,c,d on the "classifying storms" worksheet! This problem is specifically modeled after one of our test questions!
- I'd recommend starting with question b, then do c, then a. Finally, after you answer a,b, and c, try d!
- For question A, you have to interpret the meaning of this question in terms of pH--if a storm cannot be classified, what does that mean about its pH?
- Question D does not require the use of normalcdf or anything...don't overthink it!
Periods E,F:
- Please complete the entire "Calculating ZScores and Percentiles" worksheet provided in class!
And here are the answers to the homework problems along with the questions
Calculating Z Scores and Percentiles Key:
- 1. Mean = 68, Sx = 7.2, Median = 60.8, Range 64.8, IQR = 14.4
- 2a. 97.59%,
- 2b. 0.38%,
- 2c. 95.25%,
- 2d. 36.94%,
- 2e. 10.39%
- 2f. IQ = 112.62,
- 2g. Q3 = 110.12,
- 2h. Q1 = 89.88
- 2i. IQR = 20.24
Classifying Storms Key:
- a. 0.98%
- b. 67.59%
- c. 12.17%
- d. 9 minor storms, 32 mild storms, 6 super storms, and 1 not classified
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