Download Review Sheet for Unit 7

Review Sheet for Unit 7 Quiz
Gathering Data and Probability
Name ______________________________
Vocabulary
Population
Sample
Experiment
Observational Study
Response Variable
Explanatory Variable
Simple Random
Sample
Discrete Variable
Continuous Variable
Probability
Distribution
Binomial Distribution
Normal Curve
Z-Score
Standard Normal
Distribution Table
Empirical Rule
Parameter
Statistic
1. We toss a coin 5 times. If we want tails, what is the probability of having:
a. 2 tails?
b. 5 tails?
c. At least 3 tails?
d. No more than 2 tails?
2. Given:
x
P(x)
1
.10
2
.45
3
.20
4
.25
a. Show that the two conditions for a valid probability distribution are met.
b. Find the mean for this probability distribution.
c. What is the standard deviation for this probability distribution?
d. Sketch a probability histrogram.
3.
What is the difference between a statistic and a parameter?
4.
List the four characteristics of a binomial experiment.
5.
In Mrs. Knight’s geometry class, her last test had a mean of 75 and a standard
deviation of 7. (Hint: find z-score and use the table!)
a. What proportion of scores fall below 65?
b. What proportion of score fall above 82?
6.
What is an explanatory variable?
7.
What are treatments?
8.
What is a response variable?