Chapter 7.1-3

Question 1

population

Answer 1

EVERYONE in a group we’re interested in collecting data on

Question 2

sample

Answer 2

a subset of the population that we collect information on

Question 3

parameter

Answer 3

the value of interest for the POPULATION

Question 4

statistic

Answer 4

the value of interest for the SAMPLE

Question 5

p

Answer 5

population proportion, parameter

Question 6

p hat

Answer 6

sample proportion, statistic

Question 7

N

Answer 7

population size

Question 8

n

Answer 8

sample size

Question 9

mean of distribution of p hat

Answer 9

p

Question 10

standard deviation of distribution of p hat

Answer 10

sqroot(p(1-P)/n)

Question 11

shape of distribution of p hat

Answer 11

most are approximately normal
very low p=skewed right
very high p=skewed left

Question 12

condition for mean

Answer 12

random condition, given

Question 13

condition for standard deviaiton

Answer 13

independence, given (between two sample), 10% rule (sample is less than 10% of population)

Question 14

condition for normality

Answer 14

large counts condition, the following need to be greater than or equal to 10:
np and n(1-p)

Question 15

distribution of (p hat a)-(p hat b)

Answer 15

same conditions
mean=pa-pb
standard deviation=
sqroot(pa(1-pa)/na+pb(1-pb)/nb)