exam 1 review

Question 1

mean

Answer 1

n*p

Question 2

standard deviation

Answer 2

square root of ((np)*(1-p))

Question 3

binomial distribution

Answer 3

independent observations, n is fixed, there are only 2 outcomes, and p is the same for each

Question 4

normal distribution

Answer 4

density curve area under = 1, probability of any given event = 0, mean = 0, standard deviation = 1, bell-shaped and symmetric

Question 5

SOCS

Answer 5

Shape, outliers, center, spread. Used for distribution

Question 6

Dotplot

Answer 6

Quantitative x1

Question 7

Stemplot

Answer 7

Quantitative x1

Question 8

Histogram

Answer 8

Quantitative x2

Question 9

Bar chart

Answer 9

Qualitative and quantitative

Question 10

Pie chart

Answer 10

Qualitative and quantitative

Question 11

Slope

Answer 11

r (correlation coefficient) * (standard dev of y/standard dev of x)

Question 12

r vs r squared

Answer 12

r - correlation coefficient, r squared - proportion of variance explained by the independent variable

Question 13

experimental units

Answer 13

people or things participating in an experiment

Question 14

factors

Answer 14

categorical explanatory variables

Question 15

treatments

Answer 15

combination of factor and level

Question 16

levels

Answer 16

different levels of factors

Question 17

replications

Answer 17

experimental units/treatments (number of experimental units that get each treatment)