Mean, median, mode, range & outliers
Of the measures of center, this one is the most resistant to outliers
What is the median?
You should be confident that this tells you the plausible values....
What is confidence interval?
The z* for an 95% confidence interval?
What is 1.96?
An organization reports that a 90% confidence interval for the true mean grade is 84 to 90. What is the point estimate (value) from this interval?
What is 87?
The author of Romeo and Juliet
Who is William Shakespeare?
In the number set 10,9,4,4,8,8,8,4,7,6,11,14 find the mode
What is 4 & 8?
We are 99% confident that the interval from (0.10, 0.99) captures the true proportion of students who will answer this question correctly.
What is confidence interval?
What happens to the width of the intervals when you increase your confidence level
What is the width increases?
The formula for a one-sample proportion confidence interval
What is p-hat +/- z*sqrt(p-hat*(1-p-hat)/n) ?
The longest running game show on television
What is The Price is Right?
Using the following numbers, find the median: 6,3,9,6,1,3,7
What is 6?
If we were to select many samples of size n = 50 of students from a large high school and construct a 95% confidence interval, about 95% of those intervals would capture the true proportion of students who plan to attend prom.
What is confidence level?
What happens to the width of the intervals when you increase Margin of Error
What is the width increases?
The three criteria that must be met in order to use a confidence interval
What are 1. Random Sample, 2. 10% Rule (sample is less than 10% of population & 3. Large Counts (np & n(1-p) are >= 10) ?
The most-streamed artist of all time on Spotify
Taylor Swift
Find a possible missing value in the set of data if the range is 20. 14, 8, 17, 21, ____, 11, 3, 13
What is 1 or 23?
A Gallup poll found that only 28% of American adults expect to inherit money or valuables from a relative. The poll’s margin of error was +/- 3 percentage points at a 95% confidence level.
True or False, This means that:
The poll used a method that gets an answer within 3% of the truth about the population 95% of the time.
What is true?
The z* for an 90% confidence interval
What is 1.645?
An organization reports that a 90% confidence interval for the true mean grade is 83 to 96. What is the margin of error from this interval?
What is 6.5?
The number of prime numbers between 1 and 30 (inclusive).
What is 10?
(2, 3, 5, 7, 11, 13, 17, 19, 23, 29)
Frank has 3 nickels, 5 dimes, and 2 quarters. Find the mean, median, mode and range of the values of Frank's coins.
What is mean: 11.5 cents, median: 10 cents, mode: 10 cents, range: 20 cents?
A 95% confidence interval for the mean body mass index (BMI) of young Americans is 26.8 +/- 0.6.
Interpret the confidence LEVEL in context (in a sentence).
If we were to select many random samples from a population (of the same size) and construct a 95% confidence interval using each sample, about 95% of the intervals would capture the mean body mass index (BMI) of young Americans.
The z* for an 84% confidence interval
What is 1.41?
A simple random sample of 300 high school seniors in a particular city is taken, and it is found that 250 of those students do not take the bus to school. Construct a 90% confidence interval for this parameter.
What is (.798, .868)?
The person who wrote the hit song "I Will Always Love You"
Who is Dolly Parton?