Exploring one variable data
if 50 women are asked their favorite sport 20 choose dance, 17 choose basketball and 13 choose softball, what is the conditional distribution of preference for each sport?
40% for dance, 34% for basketball and 26% for softball.
If a student took four quizzes and earned a 50%, an 80%, a 75% and a 90% what would happen to the mean of the data is the student was allowed to redo their worst grade and earn a 100%?
The mean would increase.
What is the line of best fit?
A line in a scatter plot that represents a relationship between the points
What is the difference between theoretical and experimental probability.
Theoretical probability is the probability that something should happen based on reasoning and not an actual experiment taking place.
What does “IQR” stand for?
Interquartile Range
What are the four factors that can be used to describe data?
Shape, outliers, center, and spread.
If the equation to see how many snowcones a company will sell based on the temperature is y=.2997x-17 where y is the number of snow cones and x is the temperature, how many snow cones will be sold when it’s 0° outside?
0 snow cones
If you flip a coin twice what is the probability that you get heads at least once?
3/4 chance
When collecting data on the type of beverage (cold or hot), the number of calories and amount of sugar in drinks at Starbucks what is the individual in the data?
Drinks at Starbucks
The weights of newborn babies follow an approximately normal distribution with a mean of 7.6 pounds and a standard deviation of 1.1 pounds. What percentage of babies weigh between 6.5 and 8.7 pounds?
68%
A news reporter was curious to see what elderly people do in their free time. The reporter interviewed 20 people in Peake nursing home. What flaws are there in the way this data has been collected?
The reporter only asked 20 people. The reporter only asked people in a singular nursing home.
Explain how you use the formula for conditional probability.
P(A|B) = P(A and B) / P(B)
Both/given
If most of the data in a set is on the left side of the graph which way is the data skewed?
Skewed right
What is empirical rule?
A graph that displays data within three standard deviations.
What would happen to the strength of a scatter plot when the outliers are removed?
The strength of the scatter plot would increase.
A bin has 100 marbles. 42 are red 40 are blue and 18 are green.What is the probability that somebody will pull a green marble?
18%
What does the line in the center of a box and whisker plot represent?
Median
Student one scored a 75 on their most recent English test the class average was 55. Students to scored a 90 on their most recent math test the class average was 85 who scored better relative to their class average?
Student one
What is an SRS?
An SRS is a simple random sample for each member is equally probable to be chosen.
What is the probability of rolling doubles on two 6-sided die?
1/36