CH 1: Data
The time spent commuting to school is an example of what type of data? What is a possible graph you would make to summarize the data?
Quantitative Data
Acceptable graphs: Stem & Leaf Plot, Box & Whisker Plot, Histogram
Not acceptable graphs: Pie Chart, Bar graph (or segmented), Dot plot
Sean's z score is 0.53. What is his percentile?
Roughly 63
Which is the explanatory variable in the following: Dr. Chin wants to measure if a students' SAT score is correlated to overall GPA?
GPA
In order to survey the senior class about Senior Camp, class president James randomly selects two homerooms by picking names out of a hat. James performed which type of sampling method?
Cluster Sample
On average, GenZ and Millenials have how many social media accounts per user? 3, 8, 10, 12
Eight
SOCS: Shape, Outlier, Center Spread
Dr. Carter gives all students a 10 point bonus on their AP Calc exam. What will this do to the mean, range, and standard deviation?
Mean will increase by 10 points
The range and standard deviation will stay the same
What does DOFS stand for?
Direction, Outliers, Form, Strength
When Mrs. Ching surveys students on how they like the college counseling process, she finds 98% of students said they were very happy. She suspects that a small percentage of unhappy students didn't respond. Which type of sampling bias is this?
Nonresponse bias
What percentage of American citizens (330 million people) have a reported food allergy? a. 3% b. 10% c. 25%
b. 10%
What is the first quartile of the following?
1, 2, 5, 5, 6, 9, 12
2
What percentage of the data is 1, 2, or 3 standard deviations from the mean in a normal distribution?
68-95-99.7
If we are looking for the correlation between hours spent sleeping and overall health/ wellbeing, if we have a subject who slept 14 hours last night, this would be an example of _________.
Extrapolation
Statisticians observe a very strong relationship between crime rates and restaurant wait time in Honolulu. What is a possible lurking/ confounding variable?
Possible answers: Population density, season, amount of tourists
Incorrect answer: anything implying wait time is caused by crime or visa versa.
List three of the most popular five sports in the world (as defined by the world almanac?)
1. Soccer/ Football (no points for American Football) 2. Cricket 3. Hockey: ice/field 4. Tennis 5. Volleyball
If Q1 = 10, Median = 15, Q3 = 25, is 50 an outlier? Must show mathematically.
No credit for only yes/ no
Correct answer: YES
IQR = 15
1.5 x 15 + 25 = 22.5 + 25 = 47.5
50 > 47.5
Franklin runs in a cross country meet. The times are normally distributed for the 5 km race with a mean of 23 minutes and a standard deviation of 2 minutes. If Franklin runs in 20.5 minutes, what is his z score and percentile?
z score = (20.5 - 23) / 2 = -1.25
Percentile = 89.4
We would expect a 3.2 percent increase on your physics test for every additional hour spent studying. (must include the words expect and units)
What are the three required elements of an experiment?
Control, Randomization, Replication
List two of the top five artists for #1 singles all-time on the Billboard Music Charts (according to Billboard)
1. Beatles 2. Mariah Carey 3. Rihanna 4. Michael Jackson 5. Drake
Is the following Discrete, Continuous, Binomial, or Geometric Probability? Jolie wants to calculate the expected value of tennis matches she will win this season.
Discrete
What is the standard deviation of the following sampling distribution: The population is strongly skewed left with p = 0.62 and we take a sample of 40 units.
p = Root(.62 x .38 / 40) = 0.077
What would we type into the calculator to solve the following? Arthur calculates the probability of success in the math team is 0.85. What is the probability he wins 5 or more of his upcoming 10 math team competitions?
1 minus Binomcdf (n = 10, p = 0.85, x = 4)
Please check the three condition for the following sampling distribution problem: Mr. Schiff randomly samples 35 Iolani students to calculate the average hours of sleep per night of each sample
Independent - assume at least 350 students in population
Normal - at least 30 students were surveyed
All conditions met
Name the three bands based on the musicians:
1. Anthony Kiedis, Flea, John Frusciante, Chad Smith
2. Ad Rock, Mike D, MCA
3. Kurt Cobain, Dave Grohl, Kris Novoselic
1. Red Hot Chili Peppers
2. Beastie Boys
3. Nirvana