Focus Exercises
Chapter 10
6. No, the graph isn't a correct comparison of four interest rates because the objects are growing in two
dimensions instead of one. Which means the surface triangles grow quadratically, not linearly. Therefore,
the larger trian

Focus Exercises Rewrite
Chapter 17
8.In the long run (out of a large number of hands of five cards), about 2.13% (1 out of 47) will contain
three of a kind.
23. a. The wheel is not affected by its past outcomes, it has no memory; outcomes are
independent.

Focus Exercises Rewrite
Chapter 17
8.In the long run (out of a large number of hands of five cards), about 2.13% (1 out of 47) will contain
three of a kind.
23. a. The wheel is not affected by its past outcomes, it has no memory; outcomes are
independent.

2016 Presidential Debate
Hillary Clinton
College Costs
- More than half of the total funds of Clinton's "New College Compact" will go toward grants to
states and colleges. These grants will ensure that students do not need to take out loans for tuition
an

Focus Exercises
Chapter 17
8.If you play many hands in poker, The proportion of two pair will eventually get closer and
closer to 1/21.
23. a. The wheel is not affected by its past outcomes, it has no memory; outcomes are
independent. So on any one spin,

Aviance Hawkes
STAT 208-021
Focus Exercise Rewrite
Chapter 21A
4. a. The population is the 175 residents of Tonyas dorm
b. P is the proportion of all the residents who like the food.
c. The sample proportion is p = 14/50 = 0.28
7. a. p is the proportion o

Focused Exercises
Chapter 21B:
30. a. The middle 95% of individual scores is 18+/- (2)(6) = 18 +/- = 6 to 30
b. The sample mean X of an SRS of 25 students has a normal distribution (since we have a
random sample from a Normal population, as specified in t

Focus Exercises Rewrite
Chapter 14
8. The association is roughly linear and positive (high calories tend to go with high sodium, and
low tends to go with low). Point A is a hot dog brand which is well below average in both
calories and sodium.
12. The cor

Focus Exercises
Chapter 21A
4. a. The population is the 175 residents of Tonyas dorm and p is the proportion of all the
residents who like the food.
b. The sample proportion is p = 14/50 = 0.28
c. No, the population is not large enough relative to the sam

Focused Exercises
Chapter 21B:
30. a. x = 29.76 this is the 97.5th percentile of all ACT scores. [1.96 = (x - 18)/6]
b. x = 6.24 this is the 2.5th percentile of all ACT scores. [-1.96 = (x - 18)/6 ]
31. a. The confidence interval is 111.22 to 118.58. [114

Focus Exercises
Chapter 14
8. The association is roughly linear and positive (high calories tend to go with high sodium, and
low tends to go with low). Point A is a hot dog brand which is well below average in both
calories and sodium.
12. The correlation