Monday HW

Tonight, please complete the following in your textbook: (the questions are typed at the very bottom of this post):

Page 127: 35, 37, 41de

**Period A: I told you the wrong problems on the board! Sorry about that!**

• For 35c, check out the image below!

• For 37c and 41d, (estimate the IQR), this is a multi-step problem...
• First, remember the IQR measures the width of the "middle 50%" of data...
• Use invnorm( to find Q1 and Q3
• This is just like 35c!
• Then, find IQR! (Q3 - Q1)

VOCAB TEST IS WEDNESDAY! (Here's what's on it...use your old quizzes to make some flash cards and study!):

1. Quantitative Variable (Ch. 2)
2. Categorical Variable (Ch. 2)
3. Center (Ch. 4/5)
4. Spread (Ch. 4/5)
5. Mean (Ch. 5)
6. Median (Ch. 5)
7. Range (Ch. 5)
8. Interquartile Range (IQR) (Ch. 5)
9. Standard Deviation (Sx) (Ch. 5)
10. Variance (Ch. 5)
11. Outlier (Ch. 4/5)
12. Q1 (Ch. 5)
13. Q3 (Ch. 5)
14. Percentile (Ch. 5)
15. Stemplot (Ch. 4)
16. Boxplot (Ch. 4)
17. Histogram (Ch. 4)
18. Shifting (Ch. 6)
19. Rescaling (Ch. 6)
20. Z-Score (Ch. 6)
21. Normal Model (Ch. 6)

There is also a short answer section with questions about the following...

• What are the measures of center? (mean, median, mode, midrange)
• What are the measures of spread? (range, standard deviation, variance, IQR)
• What graphical displays are for quantitative data? (stemplot, dotplot, boxplot, histogram, ogive, timeplot)
• What graphical displays are for categorical data? (frequency table, relative frequency table, bar chart, relative bar chart, pie chart)
• Describe shapes of distributions completely (unimodal, bimodal, multimodal, skewed left, skewed right, symmetric, uniform)
• Know how the mean and median compare for different shapes 

Monday's HW Questions:

35.) Based on the model N(1152, 84) for the weights of Angus steers, what are the cutoff values for...
a.) The highest 10% of weights?
b.) The lowest 20% of weights?
c.) The middle 40% of the weights?

37.) Consider the Angus weights model N(1152, 84) one last time.
a.) What weight marks the 40th percentile?
b.) What weight represents the 99th percentile?
c.) What's the IQR of the weights of these Angus steers?

41.) Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 188 mg/dL and a standard deviation of 24 mg/dL.
d.) Estimate the interquartile range of the cholesterol levels.
e.) Above what value are the highest 15% of women's cholesterol levels?