Definitions
What are the measures of center?
Mean, median, mode, and midrange
What is the formula for coefficient of variation for population?
CV= sigma/mu * 100
Listed below are prices in dollars for one night at different hotels located in Las Vegas Boulevard (the "Strip"). If you decide to stay at one of these hotels, what statistic is most relevant, other than the measures of center. Find the midrange.
$170.5
What % does the Third Quartile separate of the total box plot.
it separates 75% of sorted values
What is the K value in P100
K = 100
Define event.
Any collection of results or outcomes of a procedure. (what can happen)
What is the formula for coefficient of variation for sample?
CV=S/x(bar) * 100
A classic counting problem is to determien the number of ways that the letters of "Mississippi" can be arranged. Find that number.
34630
Calculate for the IQR with given Data:
minimum- 36, Q1-42, Q3-60, maximum- 75.
What is IQR= 19
Write 43rd Percentile in its notation (Pk kth percentile) form.
P43
Define simple event.
An outcome or an event that cannot be further broken down into simpler components. (a specific outcome)
What is the formula to find z score for sample data?
Z=x- x(bar)/sigma
There are seven Harry Potter books in the Harry Potter series. If the books are read in a randomly selected order, what is the probability that they are read in the order that they are written?
1/5090=0.000198
Create a bow plot with given data
1, 1, 1, 3, 3, 5, 5, 6, 10, 10, 10, 16, 17, 18, 18, 18, 19, 19, 21, 21, 22
include: It's Minimum, Q1, median, Q3 and Maximum follow with stating what number each came out to.
Min- 0, Q1-5, Median- 10, Q3-18 Max-22
Find the 80th percentile of given data:
36, 37, 37, 39, 39, 41, 43, 44, 47, 50, 53, 54, 55, 56, 56, 57, 59, 61, 61, 65, 65, 69, 69, 75
80th percentiles = 19
Define quartiles.
Measures of location, denoted Q1, Q2, and Q3, which divide a set of data into four groups with about 25% of the values in each group.
What is the locator formula?
L= k/100 * n
In her first semester of College, Precious took five courses. Her final grades along with the number of credits for each course were: A (3 credits); A (4 credits); B (3 credits); C (3 credits); F (1 Credit). The grading system assigns quality points to letter grades as follows: A=4; B=3; C=2; D=1; F=0. Compute her grade point average.
3.02
Create a bow plot with given data:
20, 20, 20, 23, 23, 23, 24, 25, 27, 27, 28, 29, 30, 31, 40
Include: It's Minimum, Q1, median, Q3 and Maximum and potential outliers and state what each are.
Min- 20, Q1-23, Median- 24.5, Q3-28 Max-31
outlier- 40
Find the 20th percentile of given data:
36, 37, 37, 39, 39, 41, 43, 44, 47, 50, 53, 54, 55, 56, 56, 57, 59, 61, 61, 65, 65, 69, 69, 75
20th percentile = 39
Define percentiles.
Percentiles are measures of location. There are 99 percentiles denoted P1, P2,... P99, which divide a set of data into 100 groups with about 1% of the values in each group.
What is the formula for the combinations rule?
nCr= n!/(n-r)! r!
Based on a journal article, the probability of randomly selecting someone who has sleepwalked is 0.292. So P(sleepwalked)=0.292 (based on data from "Prevalence and Comorbidity of Nocturnal Wandering in the U.S. General Population." by Ohayon et al, Neurology, Vol.78 No. 20) If a person is randomly selected, find the probability of getting someone who has NOT sleepwalked.
70.8%
Create a bow plot with given data:
1, 20, 20, 20, 23, 23, 23, 23, 27, 27, 29, 30, 31
Include: It's Minimum, Q1, median, Q3 and Maximum and potential outliers and state what each are.
Min- 20, Q1-21.5, Median- 23, Q3-28 Max-31
Find the 75th percentile of given data:
36, 37, 37, 39, 39, 41, 43, 44, 47, 50, 53, 54, 55, 56, 56, 57, 59, 61, 61, 65, 65, 69, 69, 75
75th Percentile = 61