Math 9c Midterms

Question 1

numerical facts that can be a reference or information

Answer 1

data

Question 2

geting infos from datas -> new understanding

Answer 2

statistics

Question 3

knowledge communicated from facts

Answer 3

infromation

Question 4

TWO WAYS TO DO STATISTICS

Answer 4

• Descriptive statistics
• Inferential statistics

Question 5

graphical summaries and numerical techniques

Answer 5

descriptive statistics

Question 6

predicts, make conclusions based on a sample of the population

Answer 6

inferential statistics

Question 7

collection of all possible individuals/objects

Answer 7

population (N)

Question 8

numerical measurement describing some characteristics of a population

Answer 8

parameter

Question 9

portion or part of the population

Answer 9

sample (n)

Question 10

numerical measurement describing some characteristics of a sample

Answer 10

statistic

Question 11

getting sample from a population

Answer 11

sampling

Question 12

driving to conclusion about a population based on a sample

Answer 12

inference

Question 13

data from the entire population

Answer 13

census

Question 14

estimate population mean weight based on a sample

Answer 14

estimation

Question 15

test the claim

Answer 15

hypothesis testing

Question 16

random chosen <– equal chances

Answer 16

simple random sampling

Question 17

the resulting sample of a simple random sampling

Answer 17

random sample

Question 18

table that shows classes or intervals

Answer 18

frequency distribution

Question 19

the number of data points in the class

Answer 19

frequency

Question 20

distance between lower limits

Answer 20

class width

Question 21

difference between maximum and minimum data entry

Answer 21

range

Question 22

sum of lower and upper limits divided by 2

Answer 22

midpoint (classmark)

Question 23

percentage, divide f by the sample size n

Answer 23

relative frequency

Question 24

sum of f for that class and the previous ones

Answer 24

cumulative frequency

Question 25

bar graph for frequency distribution of data set

Answer 25

frequency histogram

Question 26

numbers that separates the classes so no gaps

Answer 26

class boundaries

Question 27

saame sa frequency histogram but uses relative frequencies instead and class boundaries

Answer 27

relative frequency histogram

Question 28

line graph - continues change in frequency

Answer 28

frequency polygon

Question 29

used to measure the center of data

Answer 29

mean (arithmetic average)

Question 30

data arranged in a frequency distribution

Answer 30

grouped data

Question 31

scores arrangement - classes category and frequencies

Answer 31

frequency distribution

Question 32

the number of observations falling in a category

Answer 32

frequency

Question 33

divides scores into two equal parts

Answer 33

median (middle score)

Question 34

scores that occurred most - nominal scale unimodal - bimodal - trimodal - multimodal

Answer 34

mode (modal score)