Summer Vocab

Question 1

definition of statistics

Answer 1

science of collecting, organizing, summarizing, analyzing and making inferences from data

Question 2

what is variability?

Answer 2

how things differ, it’s everywhere

Question 3

2 major brances?

Answer 3

inferential and descriptive

Question 4

descriptive stats

Answer 4

numbers and pictures describing a data set

Question 5

inferential stats

Answer 5

inferences, judging the whole population off info from a sample

Question 6

descriptive vs. inferential

Answer 6

descriptive tells data at hand, inferential tells the world at large

Question 7

what is data?

Answer 7

collected information and measurements

Question 8

what is a population?

Answer 8

group you are interested in, big or small, you can calculate parameters from populations

Question 9

population vs sample

Answer 9

pops are a whole group while samples are just a subset of the pop
we take samples to make inferences about a population
statistics estimate parameters

Question 10

what is a parameter?

Answer 10

numerical summary of a population, like a mean, median or mode

Question 11

what is a sample?

Answer 11

subset of a population taken to make inferences, we calculate stats from samples

Question 12

compare data-stats-parameters using quantitative data

Answer 12

data are individual measures, stats and parameters are summaries, stats are from samples, parameters are from whole population

Question 13

compare data-stats-parameters using categorical data

Answer 13

same as quantitative only with words and groups (ex. tacos and pizza) instead of numbers

Question 14

what is a statistic?

Answer 14

numerical summary of data

Question 15

what is census?

Answer 15

like a sample of an entire population, get info from every member

Question 16

does a census make sense?

Answer 16

only in small groups

Question 17

difference between a parameter and a stat?

Answer 17

parameters come from populations

stats come from samples

Question 18

difference between a census and a sample?

Answer 18

sample is a small subset while a census gets everyone

Question 19

difference between quantitative and categorical data?

Answer 19

quantitative data are numerical measurements but categorical is qualitative, data is quantitative if you can find the mean and it makes sense, data is categorical if you cant. so basically quantitative is numbers and quantitative are words

Question 20

difference between a population mean and a sample mean?

Answer 20

population is the mean of its population and its parameter, sample mean is the mean of a sample used for a stat

Question 21

symbols for a pop mean and sample mean?

Answer 21

pop - a box

sample - x with a line over it

Question 22

when do we often use mode?

Answer 22

categorical data

Question 23

how are mean, median, and mode positioned in a skewed left distribution?

Answer 23

mean, median, mode

Question 24

how are mean median and mode positioned in a skewed right distribution?

Answer 24

mode, median, mean

Question 25

who chases the tail?

Answer 25

mean and outliers

Question 26

what hat is joe wearing?

Answer 26

boston red sox