Name the Test
Mr. Paulson and Ms. Thompson are observing the National mean scores for the AP Statistics exam is a 2.89. They want to know if the local school mean score on the AP Statistcis exam is different from the national mean.
What is a 1-sample T-Test
Two events that have no outcomes in common.
What are mutually exclusive events
A local TV news station has a daily poll that they ask their viewers. Every day at 5:00 PM they put up a QR code on the screen and anyone who is watching and would like to respond may do so and answer the question.
What is voluntary response bias?
A game costs $1 to play. In order to win, you must roll the number 1 on a fair, six sided die, on two consecutive rolls. If you win, you walk away with $35. What is the expected value for this game?
-.0278 or approximately -$0.03
You should identify this before you conduct any sort of inference test (first step in the "inference toolbox"
The mean price of gas in America is currently $4.29 per gallon with a standard deviation of $1.11. A sample of 20 southern California gas stations have an average of $5.19. Is there evidence that the gas in Southern California is more expensive than the US average?
One sample Z Test
Name three principles of experimental design.
What are control, randomization, replication, and blocking?
"What is your opinion of the schedule and the facilities at Thacher" is an example of this type of surveying error
What is a double barreled question
If you roll a fair, six sided, die 7 times, what is the probability that you roll the number 2 at least once.
72%
Stem plots, histograms, box plots, bar graphs, dot plots and scatter plots can be used to display this kind of data.
What is quantitative data?
A hospital reported 5 c-section births out of 89 patients under the age of 38. The same hospital reported 9 c-section births out of 56 patients over the age of 38.
What is a 2 proportion Z Test?
Show one of the ways in which you can test for independence
P(A)=P(A|B)
A television reporter wants to determine if Maryland residents would be interested in renovating Camden Yards, Baltimore's baseball field. The reporter asks baseball game attendees at Camden Yards if they support the idea.
What is convenience samping?
If you pull 5 cards from a well shuffled deck, each time with replacement, what is the probability that at least 3 of the cards are hearts?
.1035
What is the equation used to calculate a z-score?
(x-mu)/sigma
The mean price of gas in America is currently $4.29 per gallon with a standard deviation of $1.11. A sample of 20 southern California gas stations have an average of $4.79. Is there evidence that the gas in Southern California is more expensive than the US average?
Calculate the p value
.022
A variable that could influence your results when conducting an experiment.
Confounding variable
A survey was sent out on a new phone app to try to get information about all people in the United States. However, mainly younger Americans (aged 14-30) have this app on their phone. This is an example of ___.
What is undercoverage (or nonresponse)
In a class lottery, you have a 1/12 chance of winning the grand prize, which is a gift card for $20 to Ojai Pizza Company. You have the same odds to win a $10 gift card to Westridge. Those are the only two prizes. What is the expected value for each lottery drawing?
$2.50
What is the high cutoff point for outliers for the following data set?
4, 4, 4, 5, 6, 7, 2, 10, 14, 22, 23
29, no outliers present
In order to determine whether or not your this year's statistics students do better on the midterm exam than last year's students, you compare a sample of students from each year.
2 sample t test
Mr. James is participating in a poetry slam competition against other Whitman teachers. To move to the next level, you must beat your opponent in two out of the three rounds. There is a 64% chance that he will win the first round, as he is a strong poet. If he wins the first round, the probability that he will win the second round is 83%. If he loses the first round, then the probability that he loses the second round is 47%. If he wins the second round, the probability of winning the third round is 60%, if he loses the second round the probability of winning the third round is 45%. What are the chances that Mr. James wins the first two rounds, and then loses in the third?
What is 0.21248
You randomly select 26 individuals to participate in your experiment which is hoping to determine whether or not people perform better on memory tests in air conditioned or stale environments. The subjects then take the test based on the treatments outlined. What is the response variable?
Their performance on the memory test
The odds of hitting a hole in one in golf are approximately 12,500 to 1. If you hit 1,000 shots, and assuming your skill is acceptable for the aforementioned odds to be applied, what is the likelihood that you do not get a hole in one?
92.3%
Which of the following statements about the P value do you believe to be true?
A)The P value is the probability that the null hypothesis is true.
B)The P value is the probability that the alternative hypothesis is true.
C)The P value is the probability of obtaining the observed or more extreme results if the alternative hypothesis is true.
D)The P value is the probability of obtaining the observed results or results which are more extreme if the null hypothesis is true.
D