Distributions
What would be the distribution of a graph of frequency of studying vs test scores?
Negative Skew
What is the probability of rolling a 3 on a 6 sided dice?
1/6 or 16.67%
Find the mode of
12, 8, 4, 8, 1, 8, 9, 11, 9, 10, 12, 8
8
What is the term name for "characteristics that differ"?
Variables
Rankings in a race fall under what scale of measurement? (1st, 2nd, 3rd place)
Ordinal
What would be the distribution of a graph of GPAs of students enrolled in the Webers Honors College?
Negative Skew
On a six-sided die, each side has a number between 1 and 6. What is the probability of throwing a 3 or a 4?
1/3 or .33
Find the median of
47, 41, 52, 43, 56, 35, 49, 55, 42
47
What is the name and purpose of this formula?
#1
Sample Mean - Find the average number in the data set
What is the IV "How does phone use before bedtime affect sleep?"
Phone use
What would be the distribution of a graph of students in the library vs days until finals?
Positive Skew
Using a six-sided die, Carlin has rolled a six on each of 4 successive tosses. What is the probability of Carlin rolling a six on the next toss?
1/6 or 16.67%
Find the mean of
9, 7, 11, 13, 2, 4, 5, 5
7
What is a construct?
Internal attributes, traits, and concepts.
Weight falls under what scale of measurement?
Ratio
What would be the distribution of a graph of peak restaurant hours?
Bimodal
There are 6 blue marbles, 3 red marbles, and 5 yellow marbles in a bag. What is the probability of selecting a blue or red marble on the first draw?
9/13 or 69.23%
Find the mode of
22, 19, 22, 17, 29, 24, 17, 15
17 and 22
What is the name and purpose of this formula?
#3
Population Variance - The average amount that each value differs from the mean
When do we use grouped frequency tables?
When analyzing (eg. graphing) large sets of data
What would be the distribution of a graph of SAT scores?
Normal
In a lottery game, there are 2 winners for every 100 tickets sold. If a man buys 10 tickets, what is the probability that he is a winner?
1/50 or 2%
Find the median of
12, 17, 3, 14, 5, 8, 7, 15
10
What is the name and purpose of this formula?
#2
Sample Z-score - find the # of standard deviations a value is from the mean
if you are .65 SD below the mean, what percentile are you in?
25.78 percentile