Z-scores
What is the z-score?
M=70, S=8, X=66
z= -1.25
What is the probability of rolling a 3 on a standard die?
1/6 or 0.1667
What is the z-crit of a two tailed test at alpha=0.05
1.96 (& -1.96)
What was the first state?
Delaware
When is your next test?
Tomorrow!
What is percentage of the population will be above 65?
µ=45, σ=7
0.21%
What is the probability of picking a face card in a standard deck of cards?
4/13 or 0.3077
What are the four steps of hypothesis testing?
1. State hypotheses (null and alternative)
2. Set Criteria
3. Calculate test statistic
4. Make a decision
How many properties are on a Monopoly board?
28
How many absences can you have and still obtain a 100 for participation?
About 3
What is the percentile rank for a score of 50?
M=66, S=11
7.35%
What is the probability of rolling three sixes in a row on a standard die?
1/216 or 0.0046
What is the formula for a z-test?
z= M-μ /σ/√n
Who is Barbie’s little sister?
Skipper
How fast was the first person ever convicted of "speeding?"
8 MPH
What score is represented by the 85th percentile?
M=30, S=4
X=34.16
If you roll a die 10 times and land on 1 every time, what is the probability that the next roll will be a 1?
1/6 or 0.1667
What sentence do we have to right at the end of a reject statement?
This result is unlikely to be due to sampling error, p<0.05.
In what state is it legal to hunt unicorns?
Michigan
In Florida, only on Sundays, it is illegal for a single woman to do what?
Skydive
What is the proportion of scores between 28 and 33?
M=25, S=3
0.1549
Find the probability of throwing a total of 8 in a single throw with two dice.
5/36 or 0.1389
Write a retain statement for the following problem:
A researcher is testing to see if listening to classical music while studying helps to improve test scores.
Retain Ho. Participants who listened to classical music while studying did not perform better on tests than those in the general population who did not. Any difference may be due to sampling error.
What is the real name of the Cookie Monster?
Sid
What is the probability that a score falls between 60 and 74?
M=65, S=8
0.6065