Stats Test 1

information and definitions for statistics test no. 1

qualitative

are nominal levels of measurements quantitative or qualitative?

a parameter is based on population, and a statistic is based on a sample

what is the difference between a parameter and a statistic?

ratio

length of time

interval

time of first class

nominal

major field of study

ordinal

course evaluation scale: poor, acceptable, good

ordinal

salesperson performance: below average, average, above average

ratio

price of company’s stock

nominal

names of new products

interval

temperature in CEO private office

simple random sample

assign each business in the island business directory a number, and then use a random-number table to select the businesses to be included in the sample.

cluster sample

use postal ZIP codes to divide the state into regions. pick a random sample of 10 ZIP codes areas and then include all the businesses in each included sample

convenience sample

send a team of five research assistants to bishop street downtown. let each assistant select a block or building and interview an employee from each business found. each researcher can have the rest of the day off after getting responses from 20 different businesses

systematic sample

use the island business directory. number all the businesses. select a starting place at random, and then use every 50th business listed until you have 100 businesses.

cluster sample

randomly select some MMH facilities from each five geographic regions, and then include all the patients on the discharge lists of the selected hospitals

systematic sample

at the beginning of the year, instruct each MMH facility to survey each 500th patient discharged

convenience sample

instruct each MMH facility to survey 10 discharged patients this week and send in the results

divide the frequency by the total

how do you determine relative frequency?

continuous variable

suppose the average American tosses away 4.9lbs of garbage every day. the amount of garbage tossed daily is the ______

discrete variable

tires salvaged from a truck accident on i-80 are on sale at a particular tire store. of the 49 tires offered for sale, 7 of them have suffered internal damage, and the remaining 42 are free of damage. the number of damaged tires for sale from the truck accident is the ________

statistic

a _______ is a number that describes a sample

parameter

a _____ is a number that describes a population

statistic

a survery of 4,000 americans found that 67% voted in the last election. the number 67% is a ________

statistic

a jokester polled 200 people and asked if they enjoyed taking polls. 79% of the people asked said no. the number 79% is a ________

size of the sample

a jokester polled 200 people and asked if they enjoyed taking polls. 79% of the people asked said no. the number 200 is the __________

ratio

numeric data that have order, in which we know the exact value between units, and also have an absolute zero, are called ________

nominal

discrete data in which data are neither measured nor ordered, but subjects are allocated to distinct categories, are called _______

ordinal

a psychologist gauges patient’s responses on a scale of terrible, not great, okay, good, or great. what level is this an example of?

smallest to largest

stem and leaf displays are in order of _______

yes

does the number get put into the chart twice if it is repeated in the data in a stem and leaf chart

largest to smallest

pareto charts go in order of

spread out

are the columns touching or spread out in a pareto chart

the categories being looked at

what goes on the bottom of a pareto chart

divide the frequency by the total then multiply by 100

how do you turn the frequency into a percentage for a circle graph

highest number - lowest number

\------------------------------------

desired number of classes

how do you find class width

upper number + lower number

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2

how do you find midpoint

carry the first frequency over, and then add each frequency going down the chart; should end up with total

how do you find cumulative frequency?

add the lowest number to (class width - 1) , and then add one to the beginning of the next row

when determining class limits, what do you do