( b ) The hotel ratings are usually on a scale from 0 star to 5 stars . The level of this measurement is
( i ) interval
( ii ) nominal
( iii ) ordinal
( iv ) ratio
( c ) On the day of the last presidential election , UMUC News Club organized an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left those polling stations . This type of sampling is called :
( i ) cluster
( ii ) convenience
( iii ) systematic
( iv ) stratified
3 . The frequency distribution below shows the distribution for IQ scores for a random sample of 1000 adults . ( Show all work . Just the answer , without supporting work , will receive no credit .)
( a ) Complete the frequency table with frequency and cumulative relative frequency . Express the cumulative relative frequency to three decimal places .