Proportions/
Percents
Percents
The percent of people with a weight between 100lbs and 130lbs if the weight of people is normally distributed with μ=200lbs and σ=50lbs.
What is 5.8%
The percent of data that falls above the mean
What is 50%
The z score of the number of loaves of bread a family eats 51 loaves of bread per year given the data follows the distribution N(35,8)
What is z=2?
The IQR range rule
Lower outlier: Q1-(1.5 x IQR)
Upper outlier: Q3+(1.5x IQR)
The amount of candy children in Oregon eat each Halloween is normally distributed, N(12,3). How much candy do at least 25% of children eat on Halloween?
what is 9.97 pieces of candy
The percent of college students that walk between 8,382 steps and 9,182 steps if the amount of steps taken per day by a college student is normally distributed with μ=8,782 and a σ= 400.
What is 68%
The z score of a chameleon with tongue length less than 5 inches if the length of chameleon tongues is normally distributed with μ=6 inches and σ=1 inches
What is z=-1?
Area under a density curve
What is 1?
The weight of penguins is normally distributed with μ=35 and a σ=2, what proportion of penguins weight more than 36.5 pounds?
what is .226
The percent of data between the 3rd and 2nd standard deviations if the startup time of computers is normally distributed with μ=1 minute andσ=15 seconds
What is 4.7%
The z score with 90% of the data below it if the length of snakes is normally distributed with μ=3.3ft and σ=6.6in
What is 1.28?
outliers (according to the IQR range rule) for a normally distributed data set with μ=481, Q1=342, Q3=501, and σ=62
What are values 103.5 and less and values 739 and greater?
The % of data that is above a z-score of 1.53 if a car length is normally distributed with μ =14.7 σ = 2
What is 6.3%
The height of baby penguins follows the distribution N(120cm,8cm). What is the minimum height a penguin must be in order to be in the top .15% of penguin height?
What is 144cm?
The z-score of the bottom 30% of the data if the download speed of video games is normally distributed with μ=45mb and σ=10mb.
What is z=-.52?
The weight a cow must be to have a z score of -1.9 if the weight of cows is normally distributed with μ=1,600lbs and σ=80lbs.
What is 1448?
The average weight of a horse follows the distribution N(1000,50) and the average weight of a cow follows the distribution N(850, 35). If a donkey weighs 906 lbs and a horse weighs 1,062 lbs, which animal is heavier for its species?
What is a donkey?
The maximum mileage a car can have to be in the bottom 16% of cars, given the data is normally distributed with μ=1,050 miles and σ=300 miles.
What is 750 miles?
The z score of the bottom 45% and top 45% of the data if the height of oak trees is normally distributed with μ=100ft and σ=10ft.
What is -.126 and .126?
The weight that a proportion of only .01 of all capybaras are heavier than if the weight of all capybaras are normally distributed with μ=125lb and σ=13lb.
What is 155.29lb?