Midterm

Question 1

Seven ways to organized data

Answer 1

Dot Plot
Stem and leaf
Histograms
Line graph
pie chart
pictography
Bar graph

Question 2

Dot plot

Answer 2

Placing dots above a number line

Question 3

Stem and leaf

Answer 3

are often vertical and are particular useful for comparing two small sets of data

Question 4

Histograms

Answer 4

summarize large sets of numeric data that can be naturally grouped into numeric intervals

Question 5

Line graph

Answer 5

are constructed using an X axis horizontally and a Y axis vertically. A line connects the dots

Question 6

Bar graph

Answer 6

are used for categorical data

Question 7

Pie Charts

Answer 7

visual understand of apportionments of he whole

Question 8

Pictographs

Answer 8

use small figures called icons to represent data or trends

Question 9

Three ways of measuring central tendency

Answer 9

Mean is the average
Median is the middle
Mode is the most often occurring number

Question 10

Three ways to measure “spread” and “variability” data

Answer 10

Range is the difference between the largest and smallest data value
Mid range is the lowest and highest data points divided by2

Question 11

Interquartile range

Answer 11

IQR- is the middle 50 percent of the data value, from the lower to the upper quartile value Qu-QL=

Question 12

Outliers

Answer 12

Ql-(1.5*IQR)

Qu+(1.5*IQR)

Question 13

5 number summary

Answer 13

Lowest date value
Lower quartile
Median
Upper quartile
Greatest value

Question 14

Standard Deviation

Answer 14

Know this

Question 15

Quartiles

Answer 15

Dividing the data set into fourths or quartiles

Question 16

The 68-95-99.7 rule for normal distributions

Answer 16

For a population that has a normal distribution about 68 percent falls with in 1 standard deviation of the mean, about 95 percent falls with in 2 standard deviation of the man, and about 99.7 falls with the 3 standard deviation of the mean.

Question 17

Z score-

Answer 17

if x an observation in a set of data with mean -x and the standard deviation s, the z score corresponding to x is given z= x-x/s
Z(9.2)= 9.2-8.5/1.6 equals .4375 equal .44

Question 18

Experimental

Answer 18

is estimated by the number of times an outcome has occurred in the past trails and the likely hood that the outcome will occur in the future

Question 19

Theoretical

Answer 19

based on considerations such as symmetry

Question 20

Probability

Answer 20

Is the mathematics uncertain, in which the likelihood that a chance event occurs is measured by numbers between 0 and 1, where 0 indicates there is no chance of the event and 1 indicates that the event must certainly occur

Question 21

Theoretical probability

Answer 21

does not depend on past experiments or statistical data

Question 22

Mutually exclusive event

Answer 22

VINN DIAGRAM If E and F are mutually exclusive events in a sample space S then
P(E or F)=P(EUF)=P(E)+P(F)
if the events in S are equally likely, then
P(EUF)=n(E)+n(F)/n(S)

Question 23

Non mutually exclusive events

Answer 23

VINN DIAGRAM

Question 24

Complementary events

Answer 24

VINN DIAGRAM

Question 25

Meaning of n

Answer 25

5!=54321

Question 26

Multiplication principle of counting

Answer 26

n1n2n3 ….

Question 27

Conditional Probability

Answer 27

use vinn diagram

Question 28

Permutation

Answer 28

is an arrangement of given number of objects from a specified set into and ORDERED list. “Are the selected objects arranged into an order?”
P(10,4)
1098*7

Question 29

Combinations

Answer 29

is a selection of a given number of objects from a set to form an UNORDER subset of the objects. "DO we need to know only which objects are selected with the order of the objects making no difference?"
C(10,4)
10*9*8*7
------------
4*3*2*1

Question 30

Odds in favor

Answer 30

comparing the likelihood that the event will happen with the likelihood that it will not happened

Question 31

Expected value

Answer 31

(value of outcome#1) * (probability of that outcome)+(value of the outcome #2) * (its probability)+…+(value of last outcome)*(its probability)