1.34)
b) the shape of the distribution is right skewed. Seven of the food oils have more omega
3 than omega 6. This distribution says that there is not enough omega 6 in the modern
food oils.
c) these values support the idea that eating fish is healthy. T
Brinn Card
Statistics Homework 1
1)
a) Laurie Abrams, Gordon Brown. Maria Cabrera and Miranda Ismael
b) It contains five variables
2) Quantitative: energy consumption, net capacity
Qualitative: brand name, model, freezer type, energy star compliant
3)
4)
Stress and Coping
3/2/17
Stress in the US has increased 30% over the last 30 years
35% of Americans are chronically stressed this year
women are more stressed than men
top 10 reasons for stress
1. job pressure
2. money
3. health
4. relationships
5. poor
1) Mean of x and y
2) Standard deviation of x and y
3) Make table of z scores z-x and z-y
ZX
1
2
n
Correlation
ZY
4) Inside table : x1- mean of x/ standard deviation of x and same for y
Scatter plot of x and y
Direction forms either linear or non linear
barplot(table(PCTGRAD), main="Percent of on-Time High School Graduates
",col=c("gray","blue"),ylim=c(0,20),xlab="Percent of Graduates",cex.lab = 1.5)
2) Quantitative: energy consumption, net capacity
Qualitative: brand name, model, freezer type, energy st
Brinn Card
Intro to Statistics
Homework 5
3/31/17
4.15) C- a lower reaction time would mean death comes faster
4.16) B- IQ- 103 and SPA is .05
4.17) A- there is a strong positive linear correlation
4.18) C
4.26)
a) I expected this to be a positive linear
Variables that help us cope
Benefits of moderate stress
o Meet daily challenges
o Motivation to meet goals
o Complete tasks efficiently
o Boosts memory
Burn out
o A stress related illness that is the result of repeated emotional pressure related
to invol
Types of Averages:
Median: The number which is in the middle
Ex. 2, 3, 4, 4, 4, 5, 6, 7, 7, 7, 8, 8, 9 the median would be 6
Mean: The standard mathematical average where the numbers/amounts added up and then
divided by the number of numbers
Mode: The mos
Normal Distributions: A type of probability distributions which states that a function
illustrates the probability that the event/thing will fall between two real numbers (nonimaginary numbers).
Brinn Card
Statistics Homework 1
1)
a) Laurie Abrams, Gordon Brown. Maria Cabrera and Miranda Ismael
b) It contains five variables
2) Quantitative: energy consumption, net capacity
Qualitative: brand name, model, freezer type, energy star compliant
3)
4)