AP STATISTICS INTRO TO INFERENCE WORKSHEET
Name ____________________________________________ Date __________
Review Items
1) What are the parameters in a binomial distribution? Choose from n,p, and x.
2) What is the mean of a binomial distribution with n = 100 and p = .7?
3) Fill in the entire table for the binomial distribution with n = 4 and p = .5
X
0
1
2
3
4
P(X)
Mean of X =
Standard Deviation of X =
X is this type of variable ______________________________
4) Fill in the table for the geometric distribution with p =.25 using the x values 1 – 5.
X
1
2
3
4
5
P(X)
Mean of X =
X is this type of variable ______________________________
5) The mean IQ is 100 with a standard deviation of 15. If IQ scores are normally
distributed then find the probability that someone is considered a genius, if genius is
defined as an IQ score of 142 or higher. Calculator work is fine.
For each of the following, name the statistic, the parameter and the population of interest.
1)
STAT:
2)
STAT:
The average SAT scores of current McQueen high school seniors is 480. Mrs. W conducted a
survey in her classes and found that the average for her seniors is 560.
PARAMETER:
POPULATION of interest:
The IRS interviewed 170,000 corporate business owners and found that 10.7% of them worked
50 hours or more each week. That was surprising to Natural because she had recently read that
11.34% of all corporate business owners work 50 hours or more each week.
PARAMETER:
POPULATION of interest:
AP STATISTICS INTRO TO INFERENCE WORKSHEET
3) A recent report stated that 98% of all Americans think the number 7 is lucky. In a recent survey
done by Andy, only 75% of Americans thought the number 7 was lucky.
STAT:
PARAMETER:
POPULATION of interest:
4) The average score for all of the McQueen Algebra 2 Finals in 2013 was 68%. The average for Mr.
Gallaher’s classes was 70%.
STAT:
PARAMETER:
POPULATION of interest:
5) LIST all stats we have studied using symbols:
6) LIST all parameters we have studied using symbols:
7) Give an example of when it would be appropriate to conduct a census.
8) Ahsan conducted a study and found that the average amount students spend on lunch daily was
$5.60. Andrew conducted a similar study but asked different students and ended up with an average of
$4.30. Name the term that describes this difference.