Review

Quiz tomorrow!

Ch. 8 #35, 36

Regression practice

Ch 8 #7bcd
#28 all + (e) interpret slope
#33 all + (f) interpret r + (g) interpret r^2

residuals

Ch. 8 #7a, c, e, f & #9

slope and y-intercept

Ch. 8 #25a & c, #29a, c, e, f

Scatterplots

Ch. 7 #4, 6, 8

some review ideas, Unit 1

Outlier fences:
Q1 - 1.5IQR
Q3 + 1.5IQR

sd is always positive
(or zero if all the data is identical)

Categorical graphs:
bar and pie

Quantitative graphs:
stem and leaf (shows data)
boxplot (can hide shape)
ogive/cumulative freq
dotplot
histogram

Independent data makes bar graphs with similar levels

The mean is lower than the median for skewed left data

Measures of spread:  IQR, sd and range
Measures of center: mean and median
Which of the above are resistant?  med and IQR

Rule of thumb:  68-95-99.7

z-score formula:  (x - mu)/sigma

review for wednesday's test

Ch. 3 #22

Unit 1 review #11, 25, 29fg, 30

normal cdf

Ch. 6 #26abc and 17
Answers:
a)  Only 0.07% of tires last longer than 40,000 miles.  Not very likely!
b)  21.19% (z score is -0.8)
c)  67.31% (z scores are -0.8 and 1.2)

Tuesday night's HW

Ch. 6 #7, 11, 12
Page 113 #36
If you ever come looking for homework and I forgot post it, feel free to email me!  I check email on my phone too much, so you'll get a fast reply!

review

Both review assignments are due tomorrow!